Ocean Sunfish (Mola mola) are the largest bony fish in existence, measuring up to across and weighing lbs. Their favorite food is jellyfish. They have no tail. At night they often come to the ocean's surface for hours at a time, barely moving.
Glaucus atlanticus (commonly known as the sea swallow, blue angel, blue glaucus, blue dragon, blue sea slug and blue ocean slug). This little sea slug eats poisonous jellyfish and stores their venom for its personal use