Rugose Floater

Rugose Floaters are heavily wrinkled, fish-like Darwin IV inhabitants that float in the air. During spawning season, they have eggs trailing behind their "fins" and reduce to their crescent shape when spawning is complete. When threatened, they release a cloud of particles from their black eye-like appendages to fragment its sonar image, but this doesn't stop Skewers from attacking them.

Trivia

 * This is the creature seen on the front cover of Expedition.