White - colored shark shark near Costa Rica

The shark is six feet [2 m] long, and its orange color is the result of xantism, a rare pigmentation that causes excess yellow and gold tons in leather, scales, or animal wool. Although xantism has been observed in certain species of fish, it has never been documented in fish [...]
Besides xantism, the shark also displayed albinism, which explains its amazingly white eyes. Nurse sharks and babysitter sharks have light brown skin or dark brown, which helps them to mix with reefs and rocky habitats on the seabed, where they spend much of their time hunting prey.
The discovery of this shark raises important questions about the genetics and adaptability of this species. Is this a unique phenomenon or a signal of a new genetic trend in the local population”, the study said.
Based on the size of the shark, researchers from the Federal University of Rio Grande do Sul concluded that this unusual pigmentation does not affect his survival.

Xanthism is considered extremely rare in the animal kingdom. Some species of fish, reptiles, and birds have been reported, but confirmed cases remain limited. In freshwater fish, such as guppies, guidelings, and even red fish, this condition sometimes produces amazing yellow mortars.
Some birds, such as parrots and canaries, have also shown that they display golden feathers accompanied by ksantism, while random reports in reptiles describe extremely yellow snakes or lizards.
Since this dye makes animals more visible, scientists believe that ksantism often lowers the survival rate in the wild.
Albinism, though slightly more popular, is also rare and can present serious challenges to animals that develop it.
Melanin's absence results in pale skin, scales, or hair, along with white or red eyes. In nature, this lack of natural camouflage can make animals albino easier targets for predators and hunters.
The situation can increase the sensitivity of sunshine and, in some cases, reduce the possibility of finding a partner.
Hence, the fact that the nanny shark, which displays both cystnicism and albinism, survived until adulthood, makes this discovery especially important./Periscopi/



The adult shark's survival also provides a rare mirror on species adaptability and raises new questions for marine biologists about genetic diversity in Caribbean nanny sharks populations.
Diet sharks are Bentic predators, which means that they spend most of their time in or near the seabed, often around reefs and rocky areas.
Their typical brown color helps them to mix with their surroundings, making them more difficult to detect.
However, the shark's bright yellow-range color would have distinguished it, making its survival of adulthood especially remarkable.

It is not clear whether this unusual dye offers any advantage or whether the shark has simply been able to thrive despite its appearance.












