Antennarius pictus eating live shrimp. Notice the dark bands on the illicium (rod), which distinguish it from Antennarius maculatus, the wartskin angler
In captivity, anglers usually require live food items such as saltwater feeder shrimp or small saltwater fish. Goldfish and other freshwater fish are not suitable foods for anglers; they are too high in the wrong type of fat and will quickly lead to health problems. With persistence and patience some anglers may be trained to eat frozen foods from a feeding stick. Small anglers that are still growing need to be fed several times a week, but healthy adult anglers should be fed twice a week. A well balanced diet including silversides, clam, shrimp, squid, and other meaty foods is important. Because of their sedentary lifestyle, a single angler can be housed in a small aquarium of at least 20 gallons. Stinging corals and anemones may sting these demersal fish, so use caution. Anglers can eat fish up to two times their body length. Angelfish and other algae grazers may accidentally nip at an angler. In large aquariums anglers may be kept with peaceful fish that are at least twice their size, such as boxfish, rabbitfish, sweetlips, and squirrelfish. Most large, aggressive fish like triggers and puffers should be avoided, as they can easily harm an angler. Similar ambush predators like other anglers, scorpionfish, lionfish, and leaf fish of the same size may be kept with an angler. Anglers are sometimes aggressive toward other anglers, and if they are not the same size, a smaller angler may be eaten. To reduce aggression in multiple angler aquariums, it may be necessary to feed them more often.