🦈 Unprecedented: an orange shark discovered in the Caribbean

A shark with orange hues and a spectral gaze emerges from the Caribbean depths... An unexpected discovery that puzzles marine biologists about the mysteries of deep-sea genetics.

This unique observation of an Atlantic nurse shark upends usual classifications. Captured and then released by sport fishermen off the coast of Costa Rica, this specimen exhibits an exceptional chromatic anatomy that is the subject of in-depth scientific study.

A remarkable pigmentation anomaly

The observed shark sports intensely orange skin, very different from the characteristic gray-brown coat of its species. Its eyes, lacking a visible iris, complete this spectacular appearance. Researchers describe in Marine Biodiversity this rare combination of partial albinism and xanthism (yellow pigmentation of the skin).

This genetic condition results from excessive production of yellow pigments and a simultaneous reduction in melanin. The phenomenon remains extremely rare in cartilaginous fish like sharks. Its scientific documentation is a first in this region of the world.

The animal measured about two meters (6.5 feet), indicating it had reached adulthood. Its overall physical condition appeared excellent despite this atypical pigmentation.

Adaptation and research perspectives

The survival of this predator demonstrates a certain adaptability despite its increased visibility. Scientists believe its coloration did not compromise its growth or ability to feed. This observation invites reconsideration of the impact of pigmentation mutations on survival and reproductive capacity of species in the wild.

Environmental factors could influence the expression of such genetic traits. The high temperature of Caribbean waters could play a role in this phenomenon. The study specifies that the shark was swimming in water at 31.2 degrees Celsius (88.2°F).

The authors encourage increased monitoring of nurse shark populations. Future observations would help determine whether this case represents a singularity or the emergence of an evolutionary trend. The genetic variability of these animals deserves particular attention.