Identify the fish before applying a rule

Common names and one photograph are not enough to settle every catch.

By Louisiana Deep Sea Fishing · 2 min read · Updated October 16, 2026

Start with identification before measuring or counting a retained fish. Related species can have different rules, and a local nickname may refer to a broader group. “Snapper,” “tuna” and “trout” are not always precise enough for an official species table.

Look for a combination of features

Note body shape, fin arrangement, mouth/head features and markings. Color alone can be unreliable under different light, age or condition. Use an authoritative illustrated reference and compare important lookalikes rather than matching only the most colorful feature.

On a guided boat, ask the crew to name the fish and explain the distinguishing features. Photographs can help learning, but keep handling and the crew’s release procedure first. Do not delay an appropriate release merely to finish an identification exercise.

Connect the name with the rule

Once the species is established, check the actual water, date, trip mode and relevant fishery rules. If identity remains uncertain, do not use a convenient neighboring species’ limit to justify keeping it. See checking catch rules.

Build useful knowledge

The existing species guides introduce trip targets; they are not an exhaustive identification key. The official LDWF saltwater and freshwater resources are starting points for the species and rule context. Learn a few expected targets and their lookalikes before the trip rather than relying on a photo classifier at the moment of retention.

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