Start with your state's fish and wildlife agency
Your state's fish and wildlife department maintains the official list of endangered and threatened fish in your region. This is the most reliable source because it reflects both federal protections and any state-level additions. Most states publish this list online with photos, range maps, and descriptions of what makes each species distinct.
Search "[your state] endangered fish species" or look for the department's conservation or threatened species page. The list typically includes common names, scientific names, where each species is found within the state, and what habitat they need. Some states organize by region or watershed, which helps you know what to watch for in the specific waters you fish.
If you cannot find what you need online, call the department directly. Staff can tell you which endangered species live in the particular lake, river, or stream you plan to visit — this is faster and more accurate than reading a statewide list.
Key Takeaways
- Your state fish and wildlife agency publishes the official list of endangered fish for your region, organized by location and habitat type.
- The U.S. Fish and Wildlife Service maintains a searchable national database that shows which species are protected in each state and why.
- Field guides specific to your region show you how to tell endangered species apart from similar-looking fish you are allowed to keep.
- If you catch an endangered fish by accident, most states require you to release it immediately without removing it from the water, and some ask you to report the sighting.
- Knowing what endangered species live in your waters before you fish helps you avoid accidental catch and follow local regulations.
Use the federal database to understand protections across states
The U.S. Fish and Wildlife Service runs a searchable database at ecos.fws.gov that lists every species protected under the Endangered Species Act. You can filter by state, by species type, or by the date it was listed. Each entry includes the reason the species was protected, its current range, and recovery efforts underway.
This database is useful if you fish in multiple states or want to understand why a particular fish is endangered. It shows you the legal status — whether the species is endangered (in immediate danger of extinction) or threatened (likely to become endangered) — which affects what you can and cannot do if you encounter it.
The federal list does not replace your state's list, but it provides context. A fish might be endangered in one state and common in another, and the federal database clarifies those boundaries.
Consult regional field guides with identification photos
A field guide specific to your region shows you how endangered fish actually look in the water, not just in a textbook. Guides organized by state or watershed include photos of endangered species alongside similar-looking fish you might catch legally. This matters because some endangered fish resemble common species closely enough that anglers misidentify them.
Look for guides published by your state's fish and wildlife agency, university extension programs, or regional conservation groups. Many are available as free PDFs online. Some guides focus on a single watershed (like the Columbia River system or the Chesapeake Bay) and are more detailed than statewide overviews.
If you fish for a specific species — trout, bass, catfish — search for guides that cover endangered species in that category. A guide to endangered trout in your region will show you the exact markings and fin shapes that separate a protected species from a legal one.
Learn the specific waters where endangered species live
Endangered fish are not spread evenly across a state. They live in particular rivers, streams, lakes, or sections of larger water bodies. Your state's agency usually publishes maps showing which endangered species are found in which watersheds. Some agencies list endangered species by individual lake or river system on their website.
Before you fish a new water, check whether endangered species are present there. If they are, learn what they look like and what the catch-and-release rules are. Some waters have special regulations — you might be required to use barbless hooks, for example, or to keep a fish in the water while you remove the hook.
Local fishing forums and bait shops can also tell you which endangered species are in the waters you plan to visit. People who fish those waters regularly know what shows up and when.
Understand what to do if you catch an endangered fish
If you hook an endangered fish, most states require you to release it immediately. The specific rules vary: some states say you must keep the fish in the water at all times, while others allow you to briefly remove it to unhook it. Check your state's fishing regulations booklet or call the fish and wildlife agency to confirm the exact procedure for your region.
Many states ask anglers to report endangered fish sightings, especially if the fish is in a location where it was not previously known to live. Some agencies have online reporting forms; others ask you to call or email. Reporting helps biologists track where endangered populations are recovering and where new threats have emerged.
Do not keep a photo of an endangered fish in your possession if it means handling the fish longer than necessary to release it. The goal is to return it to the water as quickly as possible with minimal stress.
Check regulations for the specific water you plan to fish
Your state's fishing regulations booklet lists not just which fish are endangered, but also any special rules for waters where they live. Some streams or sections of rivers have catch-and-release-only rules, slot limits (a range of sizes you can keep), or seasonal closures to protect spawning populations.
The regulations booklet is free and usually available online as a PDF. It is also printed and distributed at bait shops, sporting goods stores, and fishing access points. Read the section on your target water before you go, because regulations can change year to year and vary by location within the same river system.
If a water has no special regulations listed, standard state rules apply — but that does not mean endangered species are not there. Always cross-reference the endangered species list for that water to know what you might encounter.
Join local conservation groups to stay informed
Regional fishing clubs, watershed groups, and conservation organizations often track endangered species in their area and share updates with members. These groups sometimes organize habitat restoration work, monitor fish populations, or host talks by biologists. Joining gives you access to current information and connects you with other anglers who know the local waters.
Many groups maintain websites or social media pages where they post sightings, new regulations, or changes in fish populations. Some publish newsletters or guides specific to endangered species in your region. These sources are often more current than printed guides because they can be updated quickly.
Local groups also advocate for protections and recovery programs, so membership supports the work of keeping endangered species alive in your waters.
Frequently Asked Questions
How do I know if a fish I caught is endangered?
Compare what you caught to photos in your state's endangered species guide or the field guide for your region. Look at body shape, fin color, spots or stripes, and size. If you are unsure, take a photo without removing the fish from the water and contact your state fish and wildlife agency with the photo and location. They can identify it for you.
What happens if I accidentally keep an endangered fish?
Contact your state fish and wildlife agency immediately and report what you caught, where, and when. Most states do not penalize accidental catch if you report it promptly. Intentional possession of an endangered fish can result in fines and loss of fishing privileges, so reporting protects you and helps the agency track the population.
Can I fish in waters where endangered species live?
Yes, in most cases. You can fish those waters as long as you follow the regulations for that specific location and release any endangered fish you catch. Some waters have special rules like catch-and-release-only or seasonal closures, so check the regulations booklet before you go.
Where do I find the endangered species list for my state?
Search "[your state] endangered fish species" online, or visit your state's fish and wildlife agency website and look for the threatened or endangered species page. You can also call the agency directly and ask for a list of endangered fish in your region or in the specific water you plan to fish.
Do I have to report it if I see an endangered fish?
Reporting is usually voluntary but encouraged. Some states have online forms or hotlines for sightings. Check your state's fish and wildlife website or call the agency to learn how to report. Sightings help biologists understand where populations are recovering and where new conservation efforts are needed.