Portuguese man o' war
The Atlantic Portuguese man o' war lives at the surface of the ocean. The gas-filled bladder, or pneumatophore, remains at the surface, while the remainder is submerged. As the Portuguese man o' war has no means of propulsion, they move according to the winds, currents, and tides. Although they are most commonly found in the open ocean in tropical and subtropical regions, they have been found as far north as the Bay of Fundy, Cape Breton and the Hebrides.
Man-Bat
As Man-Bat, his strength, agility and endurance are all enhanced to superhuman levels. Kirk possesses an extra set of digits that form leathery bat wings that allow him to fly, super-sensitive hearing, and a natural sonar. He emits high-pitched sound waves and can hear the echoes they make when they bounce off nearby objects, enabling Man-Bat to navigate perfectly in pitch black darkness.