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Red Lionfish

Lionfish are perhaps the most well-known invasive ocean species. While they play an important role in their native ecosystems in the Indo-Pacific, they are now wreaking havoc on reefs in the Caribbean Sea, Gulf of Mexico, and the Atlantic.

 

Red lionfish are covered with reddish or golden brown bands going down their heads and bodies, stretching across a yellow background. They have 13 poisonous spines along their back and feather-like fins on their sides. These spines and fins have dark rows of spots on a clear background. Red lionfish are native to the Indo-Pacific Ocean, where they are typically associated with warm waters and reefs. However, they have also been documented in mangroves and along coastlines in other regions of the world. After being introduced through aquarium releases off the coast of Florida, now these fish can be found in the western central Atlantic Ocean as well. With few predators in their non-native range, lionfish populations have risen drastically, which threatens other fish populations and the overall balance of the ecosystem.

Red lionfish are solitary fish, living with a few other red lionfish when they are young and while they are mating, but spending the rest of the adult life alone. Red lionfish are nocturnal, retreating into their home inside of caves or among the coral to sleep during the day, coming out to feed and explore during the nighttime. In many coral reef habitats, they occupy one of the top-levels of the food web. They are known to feed on crustaceans such as shrimp and crabs, as well as other small fish and even smaller young red lionfish. Because of their unique coloration, they blend into the background of the coral reef, not being seen by prey. They attack by quickly gulping, which sucks their prey into their mouth so quickly that surrounding fish in the group may not even notice the attack.

 

 

While this fish is not currently listed as threatened or endangered, increased pollution and degradation of coral reefs is expected to decrease populations of crustaceans and small fish, that are important prey for the red lionfish. If these changes reduce the amount of food available and they cannot adapt by eating different types of prey, their population may also decrease.

 

 

As these fish live in coral reef habitats, it is important to protect marine habitats such as coral reefs that are vulnerable to habitat loss and degradation. Oceana helps protect species by campaigning for responsible fishing practices and helping to protect coral gardens.

 

 

 

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