Researchers from a major American marine science program have identified a newly documented species of chimera, a group of cartilaginous fishes commonly known as ghost sharks or ratfish. The discovery occurred in the Andaman Sea, off Thailand, and the findings are detailed in the scientific journal RBZ.
The male specimen was found during a bottom trawl survey at a depth of 775 meters. Measuring 51 centimeters in total length, roughly one-third of its length was concentrated in the head. Notably, the fish displays unusually large pectoral fins with a feathered appearance, a feature experts believe enhances stability and maneuverability on rugged, rocky seabeds.
The newly described chimera has been named Chimaera supapae in honor of Supap Monkolprasit, a Thai researcher renowned for his contributions to the study of cartilaginous fishes. This species marks the 54th member identified within its family.
Chimeras are among the oldest lineages of cartilaginous fish, with roots tracing back roughly 300 to 400 million years. They are relatives of sharks and rays and are typically elusive, often inhabiting depths of 500 meters or more where darkness prevails. These fish feed on worms and other benthic organisms and rely on their well-developed eyes to navigate in perpetual darkness on the ocean floor.
The discussion surrounding this discovery underscores ongoing efforts to document the diversity of deep-sea life and to understand how these ancient lineages have persisted through vast stretches of time. The Chimaera supapae finding adds to the broader picture of how cartilaginous fishes adapt to extreme depths and dim environments, shedding light on evolutionary strategies that have sustained these remarkable marine inhabitants for hundreds of millions of years.