Invasive aquatic species: what the words mean and what you can do

Native means naturally occurring in the region. Introduced means moved beyond that natural range. Invasive describes an introduced species causing harm; an unfamiliar appearance alone doesn't establish that label.

Alligator gar are native fish, even if their shape looks unusual to you. Nutria are introduced mammals whose feeding damage is a Louisiana wetland-management concern, discussed in the waterside-mammal guide.

Keep three questions separate: what the organism is, whether the responsible source describes it as native, introduced or invasive in that area, and what action is appropriate. A recognition guess does not answer all three. Don't kill or relocate a fish simply because you don't recognize it, or transfer a management label from another species to this one.

Plant fragments can cling to a trailer, propeller, anchor, paddle or net. Water can remain in buckets and boat compartments. Boots and other wet gear can carry material too.

Make a short list of the items that actually touched water, including personal gear. Check net folds, footwear treads, container corners and boat or trailer fittings as well as the smooth visible surfaces. A clean-looking boat side doesn't answer for a wet net packed in a bag. A guest using hired equipment still needs to account for their own wet footwear, net or containers.

Visible material, retained water and unfinished drying are different conditions to track. Not knowing the plant's name isn't a reason to carry it elsewhere while waiting for identification; use the applicable cleanup and disposal arrangements.

Unused live bait is part of the same issue. Don't empty it into a lake or release aquarium plants or animals into the wild. Follow the site's disposal instructions and the rules for the activity.

While you're still at the appropriate cleanup area:

1. List the boat parts and personal items that got wet and assign the checks, including any hired gear responsibilities.
2. Look for attached plants, animals or mud, remove visible material and use the site's proper disposal arrangements.
3. Identify water-holding parts and drain where permitted, following the actual equipment instructions; an unchecked compartment stays unchecked.
4. Arrange drying and any additional cleaning required by the agency, equipment and site instructions before another waterbody. Keep unfinished work visible instead of treating packing as completion.

The clean, drain and dry guide explains the routine in more detail. A kayak, landing net or pair of boots deserves attention too; this isn't only a task for large motorboats.

From your existing position, photograph visible features and where the material was attached or growing if possible. Record the exact waterbody or site, observation date and time, equipment or in-water location, visible features and what remains uncertain. Keep the original note beside the photographs rather than add unseen parts to match a reference.

Use those details for an inquiry without moving the plant or animal to another waterbody. The Louisiana Department of Wildlife and Fisheries' aquatic-plant guidance is a starting point for plant identification and management questions; the site manager can help route a local concern. An identification inquiry and the equipment's cleanup record have different jobs, and neither by itself authorizes a control treatment.

Identifying and managing a species are separate from cleaning your equipment. Chemical treatment, trapping, releasing animals for control and relocating wildlife need different knowledge and authority; an identification guess isn't a treatment plan.

For an illustrative kayak visit, unfamiliar vegetation near the rudder—its steering blade—can be recorded as ‘attached vegetation, identity uncertain,’ with place, time and a photograph. Use the proper disposal arrangements and equipment instructions, then inspect the remaining wet items.

Keep separate job entries such as ‘visible material removed; container water dealt with; net drying unfinished.’ Completion of the first jobs does not complete the last. Review outstanding work before another waterbody, using the applicable instructions rather than invent a universal drying time, chemical treatment or guarantee that no organisms remain.