Swordfish 'heat' eyeball to hunt prey?

Picture 1 of Swordfish 'heat' eyeball to hunt prey? Swordfish (photo - scientific name Xiphias gladius ) often live in the high seas, especially in temperate places. However, when hunting, this fish has a rather special ability to "heat up" the eyeball to easily detect prey in the extremely dark ocean.

According to leading British researcher of fish species, Dr Ian Johnston of the University of St Andrews, this heating unit is next to the fisheye, can increase the temperature of the surrounding tissues by 10-15 o C, higher than the water temperature in which fish are living.

At the bottom of the sea, where the highest temperature is only about 3 ° C, the eyeballs that are 'heated' will help them work 10 times more efficiently, allowing the swordfish to catch the light and see the real prey. fast. Besides, this special ability also helps them to freely move deep into the seabed and expand the hunting area.

Along with swordfish, this ability is also available in 22 other fish species such as swordfish, tuna and some sharks.

NGUYEN SINH