Tags: Crustacean.
Ibacus peronii the Balmain bug or butterfly fan lobster is a species of slipper lobster. It lives in shallow waters around Australia and is the subject of small-scale fishery. It is a flattened reddish brown animal up to 23 cm (9 in) long and 14 cm (6 in) wide with flattened antennae and no claws.