Nu'uanupa'ahu, Sharkslayer

Haste, First Strike
Whenever Nu'uanupa'ahu attacks, target creature an opponent controls can’t block this turn. If that creature is a Fish or Shark, Nu'uanupa'ahu deals 3 damage to it.
Whenever Nu'uanupa'ahu is dealt combat damage, you may exile it. If you do, create a 6/6 blue Shark creature token with menace.
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"He tore the gills from the rough-skinned one, but the sea demanded his life all the same."