Goose barnacles are related to crabs and lobsters
A rare colony of goose barnacles has gone on show at an aquarium in East Sussex after being found on a beach.
More than 150 were brought into the Hastings Blue Reef Aquarium by a beachcomber after they were washed ashore on a piece of rubber.
They are normally only found in warmer waters and spend their lives attached to floating flotsam and jetsam.
Blue Reef curator Daniel Davies said they were being kept in a heated tank and fed on a diet of "live artemia".
"They arrived in two big clumps attached to the piece of rubber which we've placed into the display with them to allow them to float around just as they would in the open ocean," he added.
The goose barnacle is white or grey and is roughly heart shaped, and its shell plates are large and edged in brown, black or yellow.
The name goose barnacle comes from the creature's resemblance to a goose's head and neck.