Sea Snagret

The Sea Snagret is a fully aquatic Snavian species, and the final boss of the Saltwater Swamp in Pikmin Z. The appearance resembles a typical Burrowing Snagret; with blue scales running along its body and a bird-like head, yet with a fin on the end of its tail looking like a shark's tail, and black rings running down its body. It only comes out after you open the gate to its arena.

Biology
The Sea Snagret has evolved from the Snagret for life in the sea. As the parent to the Dwarf Sea Snagret, it can summon some Sea Snagrets out to fight with it. It swims around the arena, occasionally swimming in at you to snatch your Pikmin up with its beak. Pikmin can only attack its head, as throwing them at the body will just bounce off.
 * Diet: aquatic animals
 * Predators: N/A

Piklopedia Entry
''This is probably a rather late evolution, as it is the first Snagret to date that has evolved into a sea-going hunter. It behaves more like a fish than a Snagret, and it roams around its territory along with its children to attack and slay prey with its sharp beak.''

Strategy
In order to attack it, you'll have to lure it into charging into the wall, getting its beak stuck in the process, only then will you be able to throw your Pikmin at it safely. It can also send out Dwarf Sea Snagret to attack you. Continue this method until the Sea Snagret falls.
 * At 50% health, it will begin to use Whirlpools against you, which it makes by spinning in a barrel-roll, and zooming by. Any Pikmin caught in the whirlpool will be vulnerable to either the Sea Snagret or the Dwarf Sea Snagret.