Tue, 05 May 2026 23:49:47 +0000

Illithid: The Enigmatic Giant of the Cephalopods If you're fascinated by the mysterious and intelligent inhabitants of Earth’s oceans, the illithid is a legendary cephalopod that stands out among marine marvels. Often shrouded in ocean myths and scientific intrigue, the illithid captivates researchers and ocean enthusiasts alike with its unique biology, elusive nature, and sheer size. ### What Is the Illithid? The term illithid generally refers to sea angels (genus Clione) and related pelagic nudibranchs and cephalopods, but in modern marine biology, it’s most closely associated with the majestic sea angel (Clione limacina)—a brittle sea (a type of pelagic gastropod) renowned for its graceful swimming and fragile, gelatinous bodies. While not a true octopus or squid, some species in this group exhibit cephalopod-like traits, including jet propulsion and advanced sensory systems.