Hammerhead shark

The Hammerhead Shark is the most common member of the shark group. This large fish always appears in the ocean during the summer months, between June and September. Between the hours of 8pm and 4am, this is the only shark that can be found. The hammerhead shark has always sold for 8,000 Bells, except in the PAL versions of, where it sold for 12,000 Bells.

In City Folk
Blathers will say this when handed the big fish:

"Ah, the hammerhead shark, also, I believe, known simply as the hammerhead in certain circles. The hammer-shaped head is thought to give this shark a great sense of its environment...like radar. Compared to other sharks, this one wears a bit of a daft expression that some people find charming!"

The hammerhead can then be found "pacing" in the back tank, much like the blue marlin.

Encyclopedia Information
Once the player has caught a particular fish or bug, they can find information about it in the bug or fish menus. Once the hammerhead shark has been caught, the following information can be found in the fish menu:

Further information
The smooth hammerhead's name comes from its hammer, which lacks any sort of central indentation. It is a rather common hammerhead shark, and the second largest after the great hammerhead. It's fins are valued for the delicacy shark fin soup.