The bladder swells up and becomes bloated as air builds up and is trapped inside. The fish looses the ability to swim upright and cannot stay on the bottom of the tank. It will constantly struggle to swim and exhaust itself in the process, and other fish will pick on it knowing that it is weak. To learn more about how to diagnose and treat bacterial diseases, refer to our Bacterial Diseases in Saltwater Fish article. Diet Carnivores Eats crustaceans, inverts and other fish.
Wrasses are primarily predatory fish.
They are carnivorous mostly feeding on small crustaceans, snails, worms and other types of micro and macro-invertebrates, and some may nibble on marine plant life at times. The larger species will eat other fish. Most species adapt well to tank life, but some are best kept in an aquarium with a productive live rock and live sand bed micro-invertebrate population. This allows them to forage for live foods as they do in nature throughout the day. These are two of the larger predatory Wrasses that will find small rocks or pieces of coral rubble and turn them over to look for food.