New spiny seahorse discovered in Indian Ocean solves century-old taxonomic mystery

An international team of researchers from India and Australia has discovered a new species of spiny seahorse in the Indian Ocean, a find that resolves a taxonomic puzzle spanning over a century. Named Hippocampus amandavincentae, the new species was identified by examining specimens caught as bycatch off the coast of Tamil Nadu, India.

Through a combination of traditional physical measurements and modern DNA barcoding, the researchers confirmed that H. amandavincentae is distinct from its Pacific counterpart, the Thorny Seahorse (Hippocampus histrix), which it resembles in appearance. The new species exhibits several unique characteristics, including five sharp spines on its head's coronet, a shorter snout, and spines on all rings of its tail, unlike the Pacific seahorse's four spines and varying tail spine patterns.

Named in honor of Dr. Amanda Vincent, a leading seahorse conservation expert, the discovery of H. amandavincentae not only clarifies a long-standing scientific confusion but also offers a basis for more precise conservation strategies tailored to the Indian Ocean's unique ecosystem. The study corrects long-standing misidentifications in museum collections, ensuring that future marine biologists correctly identify this species.

As seahorses face threats from habitat loss and fishing nets, the researchers hope this finding will support ongoing research and conservation efforts in the Indo-Pacific region.