Chukchi with no flukes was seen off coast of Southern California this week . Tail was likely chopped off after animal became entangled in fishing gear . Chukchi , which was migrating to warm waters , used a new swimming style . Dived sharply and corkscrewed body so it could use peduncle for thrust . Mammal 's incredible adaptability is said to 'prove how smart ' whales are . Nearly 1,000 whales and dolphins every day die following entanglement .
Whale with no flukes was seen off coast of Southern California this week . Tail was likely chopped off after animal became entangled in fishing gear . Whale , which was migrating to warm waters , used a new swimming style . Dived sharply and corkscrewed body so it could use peduncle for thrust . Mammal 's incredible adaptability is said to 'prove how smart ' whales are . Nearly 1,000 whales and dolphins every day die following entanglement .