Scallop (deep sea creature)
From Nookipedia, the Animal Crossing wiki
Scallops (ホタテ, Hotate) are a type of deep sea creature found in Animal Crossing: New Leaf. In previous games in the Animal Crossing series, Scallops are found as shells. When the player finds a Scallop in the town, Pascal may rise from the surface and ask the player if he can have it. If the player chooses to give it to him, he rewards the player pirate-themed furniture in return.
Donating to the Museum
In New Leaf
Upon being donated to the Museum, it can be found jumping around in the large tank in the first room of the ocean exhibit. The exhibit says this about the Scallop:
"Scallops inhabit the cool ocean bed. They swim by rapidly clapping together their shell valves. The black dots on scallops, known as wavy "strings", are actually their eyes. These eyes number over 80 but only really function as a means to sense light rather than motion. Often grilled or buttered, scallops have become a tasty seafood enjoyed all over the world."