Apr 23, 2025
The ocean harbours some of Earth's most elusive and extraordinary creatures. From deep-sea dwellers to critically endangered species, here are 8 marine animals so rare, they seem almost mythical.
Getty Images
Found only in Mexico's Gulf of California, the vaquita is the most endangered marine mammal, with fewer than 30 individuals remaining. Conservation efforts are critical to prevent its extinction.
Getty Images
Recently captured on video for the first time, the colossal squid inhabits the deep Southern Ocean. Known for its massive size and elusive nature, this creature remains one of the ocean's greatest mysteries.
Getty Images
Named for its ear-like fins resembling Disney's Dumbo, this octopus lives at depths of 3,000 to 5,000 meters. Its rarity and unique appearance make it a fascinating deep-sea inhabitant.
Getty Images
With its protruding jaw and elongated snout, the goblin shark is a rare deep-sea species. Its unusual appearance and deep habitat contribute to its elusive reputation.
Getty Images
Also known as the "ghost nudibranch," Melibe colemani has a translucent, net-like body, making it nearly invisible in its environment. Its rarity and unique morphology intrigue marine biologists.
Getty Images
Endemic to the Hawaiian Islands, the Hawaiian monk seal is one of the most endangered seal species. Conservation efforts focus on habitat protection and reducing human-related threats.
Getty Images
Siphonophores are colonial organisms composed of specialised individual animals working together. Some species can extend over 40 meters, making them among the longest marine creatures.
Getty Images
The black swallower can consume prey larger than itself, thanks to its expandable stomach. This deep-sea fish's feeding habits and rarity make it a subject of fascination.
Getty Images
Thanks For Reading!
Read Next