Teddy Bear is a sunken treasure. It is a brown teddy bear. It is a decently guarded sunken treasures, being protected by a multitude of hazardous objects and creatures. Not only this, but it is at the end of a large tunnel. Therefore, if your shark is experiencing HDA, then it may not be wise to go down this tunnel.
It can be found in the right end at the basic map. It is guarded by mini subs outside the cave entrance, green jellyfish at the cave entrance, some divers, many Mega Mines, and some Toxic Barrels. This makes the Teddy Bear somewhat difficult to obtain, especially for larger sharks, which cannot dodge the barrels and mines( Megalodon and above could eat the mines, but have trouble with dodging the toxic barrels) with the ease of the smaller sharks. On the other hand, smaller sharks usually can't survive on the right hand side of the map, due to the more dangerous enemies residing on the right hand side of the map.
Moby Dick can also get this, for he can eat toxic barrels.