Habitat means the place an animal lives. Water tags describe broad settings, not today’s location of an animal. Some notes cover a group of animals, marked as a group entry. The illustrations introduce animal types; use a full reference for identification. In fin descriptions, dorsal means along the back, pectoral means at the sides behind the head, and anal means on the underside toward the tail.
Sharks
Blacktip shark
Carcharhinus limbatusHistorical Louisiana survey
A coastal shark associated with bays, river mouths and shelf water. It can resemble a spinner shark, so compare fins and body together.
A starting pointBlack-tipped fins can resemble spinner shark; compare the underside fin near the tail and the position of the first back fin.
Estuaries & brackish water · Coast & nearshore
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Bull shark
Carcharhinus leucasHistorical Louisiana survey
A heavy-bodied coastal shark that can enter estuaries and freshwater. The setting alone cannot establish whether the animal is a bull shark.
A starting pointCompare the blunt head, small eyes and rear-sloping first fin on the back.
Freshwater · Estuaries & brackish water · Coast & nearshore
Read the related guide →Finfish · Group entry
Bowfin / choupique
Amia spp.Louisiana freshwater record
A native freshwater fish often confused with introduced snakeheads. Choupique and grinnel are useful local search names.
A starting pointCompare the long back fin, rounded tail and short fin underneath near the tail with the full reference.
Freshwater
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Atlantic croaker
Micropogonias undulatusLouisiana / northern Gulf
A bottom-feeding drum of bays, estuaries and the Gulf. Its croaking sound gives the fish its name.
A starting pointLook for wavy markings and a rounded tail; compare similar spot.
Estuaries & brackish water · Coast & nearshore
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Cownose ray
Rhinoptera bonasusLouisiana survey record
A ray recorded in a Louisiana shrimp-fishery catch study. Rays and sharks have skeletons of cartilage, a flexible material rather than bone.
A starting pointIts broad body forms a swimming disc; use the full ray reference for identification.
Estuaries & brackish water · Coast & nearshore
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Sand seatrout / white trout
Cynoscion arenariusLouisiana / northern Gulf
Sand and mud bottoms support this seatrout from estuaries into the Gulf. White trout is a shared local name, so distinguish it from silver seatrout.
A starting pointOften has a yellowish tone; compare the full agency illustration.
Estuaries & brackish water · Coast & nearshore
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Silver seatrout
Cynoscion nothusLouisiana / northern Gulf
A northern Gulf seatrout that is often grouped with sand seatrout under the name white trout. They are different species.
A starting pointA silver body without the yellowish tone described for sand seatrout; use the full comparison.
Estuaries & brackish water · Coast & nearshore
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Gafftopsail catfish
Bagre marinusLouisiana / northern Gulf
A coastal catfish with long fin extensions and whisker-like feelers called barbels. It feeds at different levels between the surface and bottom.
A starting pointLook for the long fin extensions; the fin spines are sharp. Use the full reference.
Estuaries & brackish water · Coast & nearshore
Read the related guide →Louisiana / northern Gulf
A saltwater catfish of coastal water and estuaries, where fresh water and seawater mix. It lacks the gafftopsail catfish’s long fin extensions.
A starting pointCompare the whisker-like chin feelers and fins with the full reference; fin spines are sharp.
Estuaries & brackish water · Coast & nearshore
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Striped mullet
Mugil cephalusLouisiana / northern Gulf
Mullet can group together in rivers, coastal mixed water and the Gulf. They eat algae and small pieces of dead organic material, and larger fish eat them.
A starting pointLook for two separated fins along the back; stripes can be clearer on larger fish.
Freshwater · Estuaries & brackish water · Coast & nearshore
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King mackerel / kingfish
Scomberomorus cavallaLouisiana / northern Gulf
An open-water coastal predator that follows food and temperature. Young kings can have spots, making color alone an unreliable distinction from Spanish mackerel.
A starting pointCompare the sharply dipping line along the side, called the lateral line, and the first fin on the back.
Coast & nearshore · Offshore Gulf
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Spanish mackerel
Scomberomorus maculatusLouisiana / northern Gulf
A coastal predator that swims in groups and feeds heavily on smaller fish. Use the full species reference when comparing it with a young king mackerel.
A starting pointOval yellowish spots; the lateral line along the side does not dip as sharply as a king mackerel’s.
Coast & nearshore · Offshore Gulf
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Crevalle jack
Caranx hipposLouisiana / northern Gulf
One of the jacks shown in LDWF’s common Louisiana saltwater-fish reference. Identification should distinguish it from other jack-family fish.
A starting pointDark gill-cover spot and a steep forehead are useful comparison features.
Estuaries & brackish water · Coast & nearshore
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Florida pompano
Trachinotus carolinusLouisiana / northern Gulf
Despite the name, this fish appears in LDWF’s Louisiana coastal-fish poster. Compare its body, tall from back to belly, with similar jacks.
A starting pointA tall, silver body with yellow below; the sides at the base of the tail are smooth.
Coast & nearshore
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Atlantic spadefish
Chaetodipterus faberLouisiana / northern Gulf
A fish with a tall body from back to belly, included in LDWF’s common Louisiana saltwater-fish poster. Use the illustrated reference for a complete comparison.
A starting pointA spade-shaped body with contrasting vertical bands.
Coast & nearshore · Offshore Gulf
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Tarpon
Megalops atlanticusLouisiana / northern Gulf
Tarpon are included in LDWF’s common Louisiana saltwater-fish poster. Begin with identification and the intended water before choosing a specialized outing.
A starting pointLarge reflective scales and an upturned mouth are starting cues.
Estuaries & brackish water · Coast & nearshore
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Bluefish
Pomatomus saltatrixLouisiana / northern Gulf
Bluefish are included in LDWF’s common Louisiana saltwater-fish poster. A familiar name is not a reason to skip a species comparison.
A starting pointCompare the body, mouth and fins with the official illustration.
Coast & nearshore
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Blue runner / hardtail
Caranx crysosLouisiana / northern Gulf
Louisiana Sea Grant describes blue runners around northern Gulf platforms and their place in the food web. They are fish to recognize even when another species is the intended target.
A starting pointHardtail is a local name for blue runner.
Coast & nearshore · Offshore Gulf
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Blackfin tuna
Thunnus atlanticusLouisiana / northern Gulf
A Gulf tuna that can enter greener water closer to shore than some other tunas. Distinguish it from yellowfin and small tuna look-alikes.
A starting pointCompare the dark small fins near the tail, called finlets, and the golden band along the side with the full tuna reference.
Offshore Gulf
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Skipjack tuna
Katsuwonus pelamisLouisiana / northern Gulf
A tuna that swims in groups in open Gulf water. Shared names such as bonito can hide differences between skipjack, little tunny and Atlantic bonito.
A starting pointHorizontal dark lines run along the lower sides and belly.
Offshore Gulf
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Little tunny / false albacore
Euthynnus alletteratusLouisiana / northern Gulf
A Gulf tuna relative that swims in groups and can range close to shore. It is a different fish from albacore or Atlantic bonito.
A starting pointWavy marks on the rear back and dark spots low near the side fins behind the head.
Coast & nearshore · Offshore Gulf
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Gray triggerfish
Balistes capriscusLouisiana / northern Gulf
A reef-associated fish with a distinctive locking spine on its back. Young and adult fish differ in appearance.
A starting pointA tall body from back to belly and a prominent first spine on the back are comparison clues.
Offshore Gulf
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Gag grouper
Mycteroperca microlepisLouisiana / northern Gulf
Louisiana Sea Grant describes adults around raised features on the Gulf bottom and young fish closer to shore. The name black grouper is sometimes used loosely for gag.
A starting pointPatchy gray coloring; compare the detailed grouper identification reference.
Coast & nearshore · Offshore Gulf
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Red grouper
Epinephelus morioGulf range
A grouper within the wider Gulf range. Adults associate with rocky ledges and bottom habitat with living growth; young fish use shallower habitat.
A starting pointReddish-brown body, pale spots and a large mouth.
Coast & nearshore · Offshore Gulf
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Almaco jack
Seriola rivolianaLouisiana / northern Gulf
A Gulf jack associated with reefs and platforms. It can occur near greater amberjack, so compare the whole fish before naming it.
A starting pointCompare the taller body from back to belly and longer rear fin sections; use the full jack reference.
Offshore Gulf
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Swordfish
Xiphias gladiusGulf range
An open-ocean predator that moves between depths. The Gulf forms part of its nursery range—areas used by young fish. This is a specialized offshore fishing context.
A starting pointA flattened sword-like bill and large eyes.
Offshore Gulf
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Freshwater drum / gaspergou
Aplodinotus grunniensLouisiana freshwater record
A freshwater member of the drum family that often feeds close to the bottom. It is a different species from coastal redfish and black drum.
A starting pointA silvery body, tall from back to belly, without the red drum’s tail spot.
Freshwater
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Paddlefish / spoonbill
Polyodon spathulaLouisiana freshwater record
A river fish that filters tiny drifting living things, called plankton, from the water. Its spoonbill nickname does not make it a catfish.
A starting pointLook for the long, flattened paddle-shaped snout.
Freshwater
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Spotted gar
Lepisosteus oculatusLouisiana freshwater record
One of several Louisiana gars. Compare the head, body and fins together, especially for young fish.
A starting pointThe head and paired side fins have dark spots; compare the whole fish with a reference.
Freshwater
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Longnose gar
Lepisosteus osseusLouisiana freshwater record
A gar recorded in Louisiana waters that should be distinguished from alligator and spotted gar.
A starting pointA particularly long, narrow snout.
Freshwater
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Shortnose gar
Lepisosteus platostomusLower Mississippi / Gulf drainage
A gar to compare when the snout is shorter. A large gar is not automatically an alligator gar.
A starting pointCompare the head and side-fin markings with spotted gar using the full reference.
Freshwater
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Warmouth / goggle-eye
Lepomis gulosusLouisiana freshwater record
A heavy-bodied sunfish recorded in Louisiana freshwater systems. Local names can overlap, so goggle-eye is not a complete identification.
A starting pointLarge mouth; compare with green sunfish.
Freshwater
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Green sunfish
Lepomis cyanellusLouisiana freshwater record
A large-mouthed sunfish that can be confused with warmouth. It is one of several distinct fishes often grouped as bream.
A starting pointDark green body with turquoise markings and faint bars.
Freshwater
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Longear sunfish
Lepomis megalotisLouisiana freshwater record
A colorful sunfish with a conspicuous gill-cover flap. Louisiana inventories include it alongside several other bream species.
A starting pointA long flap on the gill cover, often with pale edging; this feature is called the ear flap.
Freshwater
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Smallmouth buffalo
Ictiobus bubalusLouisiana freshwater record
A native fish in the sucker family, sometimes confused with carp. Mouth position helps distinguish the buffalo species.
A starting pointLook for a downward-facing mouth without the whisker-like feelers associated with carp.
Freshwater
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Spotted bass
Micropterus punctulatusLouisiana freshwater record
A black bass to distinguish from largemouth bass. The site’s bass lesson and agency reference explain why a familiar bass outline is insufficient.
A starting pointRows of dark spots on the lower sides; use the detailed bass identification reference.
Freshwater
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Yellow bass
Morone mississippiensisLouisiana freshwater record
A bass recorded in Louisiana freshwater systems. Compare it with white bass and young striped bass.
A starting pointYellowish belly and breaks in the lower dark stripes.
Freshwater
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Chain pickerel
Esox nigerLouisiana freshwater record
A freshwater predator recorded in Louisiana inventories. It belongs to the pike family, rather than the gar family.
A starting pointA large mouth; the fin on the back and the fin underneath are far back on the body. Compare the full reference.
Freshwater
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Spinner shark
Carcharhinus brevipinnaHistorical Louisiana survey
A coastal and offshore shark easily confused with blacktip. Compare the first back fin’s position and the markings on the underside fin near the tail.
A starting pointVery similar to blacktip; use the full identification reference rather than fin-tip color alone.
Coast & nearshore · Offshore Gulf
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Finetooth shark
Carcharhinus isodonHistorical Louisiana survey
A predator of small fish in shallow coastal water, bays and estuaries. It also eats squid and crustaceans, the group that includes crabs and shrimp.
A starting pointPointed snout, long gill slits and generally unmarked fins.
Estuaries & brackish water · Coast & nearshore
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Atlantic sharpnose shark
Rhizoprionodon terraenovaeHistorical Louisiana survey
A small shark whose Gulf life cycle links breeding areas near the coast and deeper water. Its diet includes small fish and crustaceans, such as crabs and shrimp.
A starting pointA slender shark with a pointed snout; adults may have white side spots.
Coast & nearshore · Offshore Gulf
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Bonnethead shark
Sphyrna tiburoHistorical Louisiana survey
A small hammerhead-family shark of shallow bays and estuaries. It eats crustaceans and other prey and can also consume seagrass.
A starting pointA rounded, shovel-shaped head rather than the wider hammer of larger hammerheads.
Estuaries & brackish water · Coast & nearshore
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Scalloped hammerhead
Sphyrna lewiniHistorical Louisiana survey
A Gulf hammerhead with a curved front edge to its head. Historical Louisiana nearshore nursery work recorded this species.
A starting pointAn arched hammer-shaped head with a central indentation.
Coast & nearshore · Offshore Gulf
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Lemon shark
Negaprion brevirostrisHistorical Louisiana survey
A yellowish to gray coastal shark with two similarly sized fins on its back. Louisiana’s historical nearshore survey summary includes a small number of records.
A starting pointTwo similarly sized back fins are a starting feature to compare, not a complete identification.
Coast & nearshore
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Great hammerhead
Sphyrna mokarranGulf range
A shark found within the wider Gulf region. That range does not establish a sighting at a particular Louisiana beach or fishing site.
A starting pointA nearly straight front edge to the hammer-shaped head and a very tall, curved first back fin.
Coast & nearshore · Offshore Gulf
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Tiger shark
Galeocerdo cuvierGulf range
A shark within the Gulf’s regional fauna. A regional range is not a verified sighting at a particular Louisiana beach or fishing site.
A starting pointJuvenile blotches become bars; markings can fade in adults.
Coast & nearshore · Offshore Gulf
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Whale shark
Rhincodon typusUnpredictable offshore occurrence
Historically recorded at Ewing Bank off Louisiana. NOAA’s 2026 account says sharks are no longer routinely seen at that former aggregation site.
A starting pointBroad head and pale spots across a dark body; it is a shark, not a whale.
Offshore Gulf
Read the related guide →Rays
Atlantic stingray
Hypanus sabinusLouisiana survey record
A stingray recorded in a Louisiana shrimp-fishery catch study. A short directory note does not teach handling.
A starting pointCompare the broad, flattened body and tail with a detailed ray identification reference.
Estuaries & brackish water · Coast & nearshore
Read the related guide →Rays
Giant manta ray
Mobula birostrisRegional marine range
Included in NOAA’s Louisiana protected-marine-species consultation list. Its regional presence does not imply a predictable viewing opportunity.
A starting pointBroad, wing-shaped fins and projecting parts at the front of the head; compare the reference without pursuing.
Offshore Gulf
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