Lobster Casitas (Lobster Condos): What They Are & Why Florida Bans Them

In the summer of 2014, a cleanup crew working with NOAA pulled roughly 940 illegal structures and piles of associated debris from 306 spots on the bottom of the Florida Keys National Marine Sanctuary. Those structures were casitas: artificial lobster shelters, dropped on purpose to gather bugs. They are illegal in Florida and have been for decades, yet just across the Gulf Stream they are the legal foundation of entire lobster economies. Here is what casitas are, why lobster cannot resist them, and why Florida keeps them banned.

What is a casita?

Casita is Spanish for "little house," and that is exactly what one is. In its simplest form a casita is a flat roof, a slab or sheet, held a few inches off the seafloor by short legs or a frame. That gap underneath creates a wide, low, shaded crevice, the kind of shelter a lobster looks for, but far bigger than anything natural bottom usually offers. One casita can hold many lobster at once.

Around the Caribbean, casitas are purpose-built and managed as fishing gear. In Florida, where they are illegal, the ones that get dropped tend to be junk: hurricane shutters, old water heaters and bathtubs, sheet metal, concrete debris. The principle is the same. Make shade and shelter on otherwise open bottom, and lobster will move in.

Why lobster love them

The reason casitas work comes down to one idea: for spiny lobster, shelter is often the limiting factor, not food. Spiny lobster are social animals. During the day they pack into crevices and under ledges for protection from predators, often piled together, antennae out. On a stretch of seafloor with plenty of food but little structure, the number of lobster that can live there is capped by how many hiding spots exist.

Drop a casita on that kind of bottom and you have created prime real estate where there was none. Lobster find it, move in, and concentrate. For a harvester that is the whole point. Instead of covering ground looking for scattered bugs in natural rock, you return to a known shelter and take what has gathered. It is efficient, which is exactly why it is so tightly controlled.

Casitas are illegal in Florida

This is the part that matters most for anyone lobstering here. Casitas have been illegal in Florida and across the United States since the 1980s. The law works in two directions:

• You cannot place one. Putting artificial habitat on the bottom to attract or hold lobster is prohibited.
• You cannot harvest from one. It is illegal to take lobster from, or within at least 10 yards of, an unpermitted artificial structure, even if you did not put it there.

Why Florida keeps them banned

Florida has looked hard at casitas more than once. A study around 2011 suggested the habitat impact could be limited under the right conditions, and for a while the state explored whether casitas could be permitted as a legal gear type. The proposal was ultimately dropped, and the reasons are a useful summary of the case against them:

• Habitat damage. A 2008 natural resource damage assessment led by NOAA concluded that casitas in the Keys injured seagrass beds and hardbottom, the very habitat where corals, sponges, and juvenile marine life live. Junk casitas are worse: in storms they shift and tumble across the bottom and can cut coral to ribbons.
• Marine debris. Unpermitted casitas are, in plain terms, trash dumped in the ocean. When they break up or get abandoned they become long-lived debris.
• Conflict with the trap fishery. Florida's commercial fishery is built on a capped trap certificate program. Casitas are a different, highly efficient way to take lobster, and the established trap industry pushed back hard against legalizing a gear that would compete with it.
• Enforcement and permitting. Legalizing casitas raised thorny questions about jurisdiction and how you would even permit and regulate them on the seafloor. The state decided the headaches outweighed the benefits.

The Keys cleanup

The 2014 removal was not a one-off. Poachers had placed hundreds of casitas across the Florida Keys National Marine Sanctuary, and the rise of these artificial shelters drove a measurable increase in illegal commercial harvest by divers in the early 2000s. The cleanup that pulled nearly a thousand structures and debris piles off the bottom was both an environmental restoration and an enforcement action tied to a poaching case. It is a reminder that casitas are not a gray area in Florida. They are treated as illegal gear and removed as marine debris.

How casitas differ from artificial reefs

This trips people up, because both are structures people put on the bottom. The difference is permitting and intent.

• A permitted artificial reef is placed by an organization that holds a permit from the Florida DEP or the Army Corps of Engineers. Its location is public, it is built to last, and you are allowed to harvest lobster on it as long as you are outside a no-take zone. Florida has thousands of them, and Lobsterly maps 4,500+.
• A casita is unpermitted and usually private. It is dropped to congregate lobster for one person's benefit, it is often junk, and harvesting from it is illegal.

Same idea on the seafloor, completely different legal status. The published public reefs are fair game. Mystery structures are not.

Where casitas are legal: the Bahamas, Cuba, and Mexico

Cross into international waters and the picture flips. Casitas are a cornerstone of several of the world's biggest spiny lobster fisheries, all targeting Panulirus argus, the same Caribbean spiny lobster divers chase in Florida.

• The Bahamas runs much of its lobster export economy on casitas, known there as "condos." They are cheap to build and deploy, and by some estimates well over a million of them are scattered across the Bahama banks.
• Cuba and Mexico both manage major casita fisheries. In Mexico's Quintana Roo, places like Bahia de la Ascension and Banco Chinchorro run their entire spiny lobster fishery on casitas, and scientists even use them as a tool to survey and assess the stock.

Why the different choice? Largely habitat and history. These fisheries developed around vast areas of sandy, shelter-poor bottom where casitas add structure that was genuinely missing, and they are managed as a recognized gear with rules around them. Florida, with its natural reef tract and an established trap-and-dive fishery, went a different direction. It is also worth remembering that Florida and the Caribbean share one connected lobster population, since a large share of Florida's lobster drift in as larvae from these very waters. What happens to the resource upstream matters here too.

Frequently asked questions

Are lobster casitas legal in Florida?

No. Casitas are illegal in Florida and throughout the US, and have been since the 1980s. You cannot place an artificial shelter to attract lobster, and you cannot harvest lobster from, or within at least 10 yards of, an unpermitted structure. Stick to natural bottom and permitted public reefs.

What is the difference between a casita and an artificial reef?

A permitted artificial reef is placed legally by a permit holder (Florida DEP or the Army Corps) and you can harvest on it outside no-take zones. A casita is an unpermitted, often junk structure dropped to congregate lobster, and harvesting from it is illegal.

Why are casitas legal in the Bahamas but not Florida?

The Bahamas, Cuba, and Mexico manage their spiny lobster fisheries around casitas as a recognized, regulated gear. Florida built its fishery on traps and diving and keeps casitas illegal, citing habitat damage, marine debris, conflict with the trap fishery, and enforcement problems.

Regulations change. Always confirm current rules and no-take zones on the FWC spiny lobster page before you dive. Last updated June 2026.