Fish that typically inhabit sloughs include tidewater goby, California killifish, mosquitofish, and topsmelt. The waterholes are also home to bullfrogs, chameleons, dung beetles, killifish, and terrapins. The mangrove killifish or mangrove rivulus, "Kryptolebias marmoratus" (syn. Banded killifish distinguish individuals by body coloration phenotype. It lives in three hosts&colon; shorebirds, horn snails, and killifish. It is fed by numerous small creeks containing endemic native fish such as killifish. People have used banded killifish as fish bait. Early recorded species were the pike killifish ("Belonesox belizanus") and oscar ("Astronotus ocellatus"). This species is the only freshwater killifish found in the northeastern United States. Banded killifish use body coloration to determine if an individual has been parasitized or not. Usually, pike tend to feed on smaller fish, such as the banded killifish. Flagfish, native to south Florida, is another species of killifish commonly found in pet stores. The nutritional state of banded killifish influences individual's decisions to shoal or not. To improve predator avoidance, banded killifish will often take refuge. Many popular aquarium fish, such as killifish and live-bearers, are included.