Shark is not actually a shark. ©Totti, CC BY-SA 4.0, via Wikimedia Commons – Original / License Elephant Sharks (Callorhinchus milii) are a type of cartilaginous fish that live in the deep sea ...
Deep seas have extremely harsh conditions including high hydrostatic pressure, total darkness, cold, and little food and oxygen. The adaptations of fishes to deep-sea environment apparently have ...