Sea Butterfly

The Sea Butterfly is an fish that can be found in the ocean. It appears from December to February. It will appear all day. When selling it to Re-Tail, the player will earn 1,000 Bells.

Location
The Sea Butterfly is found in the ocean

The Museum
The Sea Butterfly can be donated to the museum. Upon doing so, the following text is given by Blathers:

"Sea butterflies go with the flow, as they'll drift in cold winter waters along with ice floes. They are called "ice-floe angels" because of the mysterious way they swim with their winglike arms. Their heads will open up when they make an attempt to catch their helpless prey. Once its head is opened, it grabs its prey with six special feelers called "buccal cones." The only place you'll find both cold water and tropical sea butterflies swimming together is in the game."

Quote
Upon catching the fish, the player will say the following:

"I caught a sea butterfly! I didn't even use a net!"