Oarfish

The Oarfish (リュウグウノツカイ, Ryūgūnotsukai) is a fish that can be found in the ocean between December and May. It first appeared in and can be sold for 9000 Bells.

In New Leaf
The information board in front of the tank that holds the Oarfish says the following:
 * "Oarfish are deep-sea dwelling fish with long, thin, silver bodies and one red fin lining their backs. They can reach lengths of over 10 yards (9 meters), making them huge and striking fish. They usually swim by twisting their long, thin bodies, but they can also swim in more vertical positions. Their mouths are small compared to their bodies and they have no teeth, so they're large but not imposing."

In
When donating the Oarfish to Blathers at the museum he says the following:
 * The oarfish is a long, eel-like fish that can supposedly reach up to 36 feet in length. They appear in various legends as things like messengers of the gods. It seems to me a creature like that could explain the myth of massive, ship-crushing sea serpents. It is, of course, well documented that people tend to exaggerate the size of "the one that got away".

New Leaf
Chip will say this when given an Oarfish:


 * "Ooh, I hear bad things about oarfish. People say they're too oily. Nope, not very tasty at all! Bad news! So yeah, I guess I'd better not eat it. I mean, it DOES make sense. Oars are for paddlin', not eatin'!"

Further information
Oarfish are most probably the origin of the sea serpent mythology. The king of herrings species has a published length of 11 meters (36 ft), with smaller members of the family ranging from 4.6 m (15 ft) up. Due to the consistency of their skin, oarfish rarely are caught alive.