The Cuddle Fish is a type of fish that can be caught in
Fortnite and used for a handful of different things. As of right now, not every use for them is apparent as they’re still new to the game. Obviously, their name is a play on the real fish, the cuttlefish. However, unlike cuttlefish, Cuddle Fish can be used as a weapon. As YouTuber Neon Slice points out, when thrown on the ground, they act as proximity mines, and when thrown directly at enemies, they latch onto them and explode.
There are most likely a few more uses for the fish, but as they were just introduced into the game today, only time will tell.