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Study Documents First Orange Nurse Shark on Record off Costa Rica

A peer-reviewed report identifies the Costa Rica sighting as a nurse shark with rare co-occurring pigment disorders.

Image
Fishermen spotted an orange shark in Costa Rica.

Overview

  • Researchers describe the adult shark as exhibiting albino-xanthochromism, combining intense yellow‑orange pigmentation with white eyes.
  • The animal was photographed near Tortuguero National Park in August 2024 by local fishermen with the Parismina Domus Dei tour operation, then released.
  • The study characterizes the finding as the first recorded case of xanthism in this species from the Caribbean.
  • The shark was estimated at about 200 cm in total length, suggesting the condition did not prevent it from reaching maturity.
  • Publication of the findings in the Marine Biodiversity journal has renewed circulation of the original images and prompted calls for genetic and ecological follow-up to investigate causes and prevalence.