Sea angels: transparent ocean predators that look like winged creatures (2 photos + video)

Sea angels are tiny, transparent marine mollusks that inhabit cold ocean waters. Their bodies are almost completely colorless, giving them a ghostly appearance in the water column. They move using wing-like appendages that act like fins, creating the effect of "flying" underwater. Despite their angelic appearance, these animals are active predators, feeding on other small marine organisms.