Trotline fishing regulations vary by state, but every jurisdiction that permits the gear builds its rules around the same core elements: a recreational fishing license, non-metallic line construction, a capped number of hooks, an identification tag tied to your license, daily inspection of the gear, and complete removal when you’re done. Game fish cannot be kept or used as bait, and certain waters are off-limits entirely. Break any of these and you’re looking at confiscated gear, a misdemeanor citation, and fines that can reach several hundred dollars per offense.
Licenses and Permits You Need First
A valid recreational fishing license is the baseline requirement before you deploy a trotline anywhere in the United States. Annual resident fees generally run from around $5 to $56 depending on the state. Some states treat trotlines as standard recreational gear covered by that base license. Others require a separate trotline endorsement, stamp, or permit on top of it, and a few sell trotline-specific tags for a small additional fee.
If you plan to sell your catch, or if the hook count on your gear exceeds the recreational limit, you move into commercial territory and need a commercial freshwater fishing license. The threshold varies, but exceeding 50 to 100 hooks on one person’s gear is where most states draw the line. Commercial licenses carry their own tagging, reporting, and gear-marking obligations well beyond what recreational anglers face.
Recreational Versus Commercial Thresholds
Several states define a commercial trotline purely by hook count, not by whether you actually sell any fish. If your gear exceeds the recreational hook limit, you can be treated as a commercial operator regardless of intent. That means a weekend catfishing trip with too many hooks can produce a charge for fishing without a commercial license. In Mississippi, for example, the commercial licensing requirement kicks in once you exceed 100 hooks in aggregate across all your gear.
Gear Construction Rules
State codes consistently require that main lines and drop lines be made from non-metallic materials such as nylon, braided twine, or similar synthetic cord. Metal cables and wire are prohibited because they create hazards for boats, swimmers, and anyone who encounters the line unexpectedly. The same reasoning extends to hardware: several states ban metallic posts for securing lines and prohibit glass or metal floating devices.
Floats and buoys do two jobs. They hold the line at the right depth and make it visible to boaters. Most regulations require floats to be a high-visibility color, typically white or orange, and large enough to stay on the surface in rough conditions. The line must be anchored securely so it cannot drift into navigation channels or swimming areas. Gear that breaks loose and floats into a shipping lane can be seized by game wardens as a navigational hazard, and the citation comes with it.
Hook Limits and Spacing
Every trotline state caps the number of hooks you can run, though the ceiling varies. Most recreational limits fall between 20 and 100 hooks per line, with 50 hooks being one of the more common caps. Several states also impose a per-person aggregate limit, so if you run multiple lines, the total across all your gear cannot exceed a set number.
Spacing between drop lines is also regulated. A minimum gap of two to three feet is typical. The spacing prevents hooks from snagging each other when the current shifts or a large fish thrashes, and it lets an enforcement officer count hooks without pulling the entire rig out of the water.
Bait Restrictions and Game Fish
Most trotline rules restrict the gear to nongame fish species. If a bass, crappie, walleye, or other game fish takes one of your hooks, you have to release it immediately. In many states, simply possessing a game fish while operating a trotline is a separate violation, even if you caught it earlier on another line. The list of species classified as game fish varies, but it almost always includes largemouth bass, striped bass, crappie, and various sunfish.
Bait restrictions follow the same logic. Using a game fish, dead or alive, as trotline bait is illegal in most jurisdictions. Approved baits typically include cut shad, chicken liver, commercial stink bait, and certain nongame species. Some states also restrict or require permits for live bait, particularly for species that could become invasive if they escape.
Daily bag and creel limits apply to trotline-caught fish exactly as they do to rod-and-reel catch. Having 50 hooks in the water does not entitle you to keep 50 catfish. Whatever your state’s daily possession limit is for channel, flathead, or blue catfish, that limit governs what comes home from your trotline.
Identification Tag Requirements
Every state that allows trotlines requires an identification tag on the gear. The tag has to be made from durable, waterproof material. Anglers commonly use engraved metal blanks, thick plastic strips, or laminated cards. Permanent ink, stamping, or engraving is the standard, because a tag that becomes illegible from water exposure defeats the purpose.
The required information varies slightly, but the core elements are consistent:
- Owner’s full name and physical address
- Fishing license number or customer identification number
- Date the line was set in the water
Some states have simplified their requirements and now ask only for the license number. Others still require the full set above. The date matters because game wardens use it to determine whether your gear has exceeded any time limit for how long a trotline can stay deployed.
Placement of the tag matters as much as its contents. Most rules require it to sit within a few feet of the first hook or the primary float, close enough that an officer can read it without pulling the whole line. A zip tie or stainless steel clip keeps it secure against current and wave action. A trotline found without a legible tag is treated as abandoned gear. Wardens will pull it, and you have no way to contest the removal.
Where Trotlines Are Off-Limits
Trotlines are not welcome everywhere, even in states that broadly permit them. Common restricted waters include designated trout streams, reservoir spillways, areas near dams and locks, public swimming beaches, and boat ramps. Some states publish long lists of specific lakes and river stretches where trotlines are banned outright or limited to certain hours. Seasonal closures also apply in some areas, particularly during spawning periods or heavy recreational boating season.
Placement rules apply everywhere. You cannot set a trotline across a navigation channel, attach it to a bridge or public dock without explicit permission, or stretch it in a way that creates a hazard for boats. Trotlines typically must be fully submerged to a minimum depth, often three feet below the surface, so they don’t entangle passing watercraft. Proximity rules also exist. Most states prohibit setting a line within a certain distance of another person’s trotline, a private dock, or a public facility.
Restrictions change regularly. A lake that allowed trotlines last season might not this year, so check your state wildlife agency’s current regulations before you set gear.
Checking and Removing the Line
Once your trotline is in the water, the monitoring clock starts. Nearly every state requires you to check it at least once every 24 hours. Some waters with heavier recreational traffic or sensitive species impose shorter intervals. Each check means inspecting every hook, removing any catch, releasing game fish immediately, replenishing bait, and verifying that the line and tag remain in good condition. Skipping a check is one of the easier violations for wardens to spot, because they can compare the date on your tag to the condition of your bait and catch and estimate when you were last there.
When the trip ends, complete removal is mandatory. Main line, drop lines, hooks, floats, anchors, tags: all of it comes out of the water. Leaving any part behind can trigger littering or abandoned gear penalties on top of the underlying fishing violation. Wardens in heavily fished areas actively patrol for derelict lines, and the tag you left on it points straight back to your license number.
Penalties for Violations
Most trotline violations at the state level are misdemeanors. Typical fines for gear violations such as too many hooks, missing tags, or failure to check the line run from $25 to $500 per offense. Repeat violations, fishing in restricted waters, or keeping game fish from a trotline push penalties higher. Some states authorize jail time of up to 30 days for the most serious infractions. Courts can also order forfeiture of your gear and suspension of your fishing license.
Federal Exposure Under the Lacey Act
The Lacey Act prohibits trafficking in fish taken in violation of any state law. If you catch fish illegally on a trotline and transport them across state lines or sell them, federal prosecutors can bring separate charges. A person who should have known the fish were illegally taken faces up to one year in prison and a $10,000 fine. Knowingly trafficking in illegally caught fish with a market value over $350 raises the maximum to five years in prison and a $20,000 fine. Civil penalties of up to $10,000 per violation can be assessed on top of the criminal sanctions.1Office of the Law Revision Counsel. 16 USC 3373 – Penalties and Sanctions
Endangered Species on the Line
If your trotline hooks a species protected under the Endangered Species Act, such as certain sturgeon or paddlefish depending on your waterway, federal law applies regardless of state rules. A knowing violation carries criminal penalties of up to $50,000 and one year in prison. Even an unknowing take can result in civil penalties of up to $500 per incident. Certain protected species, including Atlantic and shortnose sturgeon, require specific handling and release procedures, and you must report the encounter to the appropriate federal agency.2Office of the Law Revision Counsel. 16 USC 1540 – Penalties and Enforcement
These federal scenarios are unlikely for most recreational trotline anglers. They still matter because they turn on what species inhabit your water. If your state’s waters contain listed species, the wildlife agency’s regulations will usually name them and spell out what to do if one ends up on your hook.