Swordfish

The eye of a swordfish is about the size of a baseball. When the temperature of the swordfish's eyes is higher, the retina collects flash-like movement and sends nerve impulses faster, according to studies. Swordfish's big eyes are capable of more than only seeing in the dark; they can also hunt like a pro. The swordfish's large eyes are an advantage for a fish that hunts most at the depths of the sea, where there is little or no light.

The special effect of the swordfish’s eyes is not in their incredible vision but the ability for their eyes to heat on their own. It aids in the capture of fast-moving prey. The swordfish has a special organ for producing heat. This maintains the eyeballs at least 10 degrees warmer than the surrounding water's ambient temperature. Tuna and several shark species are examples of water creatures that employ ocular heating. The animal's brain is also heated throughout the process. According to research, bony fish like swordfish utilize this adaptation to avoid severe eye abnormalities caused by sudden and rapid water temperature fluctuations. The neural system of the animal may be harmed as a result of these problems.

Scientific Name: Xiphias Gladius

Eye Diameter : About 9-10 cm