The crew of fishing vessel Rachel Leah, Capt. Peter Brown and lobsterman Richard Figueiredo, caught the 4-pound lobster, named Lola, while fishing off the coast of Hyannis, WMTW-TV, Portland, Maine, reported Saturday.
Brown and Figuerido donated the lobster to the aquarium Thursday, WMTW said.
The lobster has five claws clustered on one side and a normal claw on the other side, said Maine State Aquarium Manager Aimee Hayden-Roderiques.
"This claw deformity is a genetic mutation," Hayden-Roderiques said. "Sometimes they have this throughout their life, sometimes this happens during a regeneration from a damaged or lost claw."
Lola joins two other lobsters at the aquarium that have similar deformities, WMTW reported.
Hayden-Roderiques said Lola is adapting well to her new tank and she would likely be on display in a few days.