Abalone

The Abalone (アワビ, Awabi) is a type of sea creature introduced in.

In
Upon donating an Abalone to the Museum, it can be found in the large pool in the first room of the Ocean exhibit, along with many other species of sea creatures. It is found close to the entrance of the large saltwater exhibit. The exhibit has this to say about the Abalone:

"Abalones grow less than an inch a year, so it takes several years for them to grow to full size. They are related to ear shells and have been used in celebrations and offerings since ancient times."

In
When donating to the museum, Blathers will say the following:

"My feathers, but the abalone is a most desceptive sea snail, wot wot! After seeing its dull brown shell from the outside, one would think it quite plain. But take a gander inside, and you'll see that the abalone's home is a shimmering beauty to behold! The inner layer of the shell is made of "nacre," or "mother-of-pearl," and, hoo, what a dazzling iridescent hue! Let this be a lesson! You mustn't judge a sea snail by the outside of its shell. Judge by the inside of its shell instead."