It shows marine life including wrasse, jellyfish, sponges, sea anemones and rays. Like many wrasse species, sheephead are protogynous. Cod and other gadids, flatfish, herring, wrasse and skates are also important locally. Far away, an Asian sheepshead wrasse is mating. Some wrasse species are aggressive towards small fish and invertebrates, others are reef safe. Cortez rainbow wrasse, Mexican lookdowns, Porcupine fish, and others. Other exhibits include weaver fish, wrasse, blennys, sea mice and crustaceans, including hermit crab. Ballan wrasse are distributed widely across the Northeast Atlantic Ocean. The "resident fish doctor and dentist on the reef is the bluestreak cleaner wrasse". They are a popular bait for all types of wrasse and pollock. The fangblenny is a specialised mimic of juvenile bluestreak cleaner wrasse. For example, the humphead wrasse may prey on the starfish amongst its more usual diet. The humphead wrasse is a U.S. National Marine Fisheries Service species of concern. Bshary and Grutter found that cleaner wrasse prefers the client tissue mucus over ectoparasites. The humphead wrasse is long-lived, but has a very slow sexing rate.