Barnacle is the eldest member of the Brothers Bears, a former scuba diver, and a shell collector.
Barnacle shares a name with barnacles, a type of underwater arthropod species. This could relate to his former career as a scuba diver, because barnacles are most often found underwater.
Barnacle wears a white turtleneck with a blue beret. His artwork reveals that he also wears black pants and blue sneakers. Barnacle's outfit was overhauled in the Game Boy Advance remake, where his outfit shows him as a retired Revolutionary-age naval captain, complete with a Bicorne hat and Epaulette uniform.
Barnacle lives in a cabin on Barnacle's Island in the middle of Lake Orangatanga. Dixie and Kiddy Kong can swim to the island after completing Doorstop Dash. In the Game Boy Advance port, Barnacle and his island were relocated to Pacifica, where he lives in a pirate ship located west of Dingy Drain-Pipe. The ownership of the island on Lake Orangatanga was transferred Bachelor, whose location is named Bachelor Pad.
Barnacle mentions that he was a former scuba diver, but eventually decided to take it easy at his home. He is proud of his shell collection, which is seen inside his Cabin, behind the Kongs. There is a Shell that Barnacle is missing from his collection, so he requests Dixie and Kiddy to locate one for him. They can purchase the Shell at Bazaar's General Store for five Bear Coins.
Barnacle also keeps a Banana Bird in a yellow cage. He explains "He just flew in once, so I decided to keep him". Barnacle would occasionally say "You know, I don't think there's anything which would persuade me to get rid of this bird". He eventually trades it to the Kongs in exchange for the Shell. When the Kongs revisit him, Barnacle mentions of how he misses the Banana Bird, and that his shell collection cheers him up.
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