Sea pig

The Sea Pig is a sea creature in  introduced in the 1.3.0 Free Summer Update.

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

"Never have I seen a creature that walks the line between creepy and cute quite like the sea pig does. Sea pigs are, in fact, a type of sea cucumber that lives deep down on the ocean floor. About four inches long, these soft pinkish oddities use tube-like legs and feelers to get around. Thus they snuffle through the mud, slurping up particles from decaying carcasses. Meanwhile, predators be warned... This little piggy tastes like poison."