Flamingo tongue (Cyphoma gibbosum) feeding on a seafan (Gorgonia ventalina) Cyphomas feed on corals and concentrate the toxic chemicals into their mantle, which they then wrap around the outside of its shell. The mantle is brightly coloured to warn predators of its toxicity. The mantle also absorbs oxygen from the water. Grand Cayman, Cayman Islands, British West Indies. Caribbean Sea.