Marine Biologists Correct Century-Old Error to Identify New Indian Ocean Seahorse Species
Researchers from Kerala University of Fisheries and Ocean Studies have resolved a 150-year-old taxonomic error. The discovery identifies Hippocampus amandavincentae as a distinct species previously mislabeled as the thorny seahorse.
Key takeaways
- Researchers identified a new seahorse species, Hippocampus amandavincentae, which was previously misidentified as the thorny seahorse (H. histrix).
- A study in Zootaxa reveals that what was once considered one widespread species actually consists of three distinct species including H. jayakari.
- The new species was found in Tuticorin harbour bycatch and photographed alive at 15-meter depths off Anchuthengu by Kerala University researchers.
- This discovery marks the fifth known seahorse species found along the Kerala coast, correcting biodiversity records dating back 150 years.
Deciphering a 150-Year-Old Taxonomic Mystery
Marine scientists have successfully untangled a century and a half of classification errors regarding the thorny seahorse, Hippocampus histrix. For decades, researchers assumed H. histrix was a single species distributed broadly from the Red Sea and East Africa across the Indian Ocean to the western Pacific. However, new findings published in the taxonomy journal Zootaxa prove this population actually consists of three distinct species.
According to Rajeev Raghavan, Assistant Professor at the Kerala University of Fisheries and Ocean Studies (KUFOS) and senior author of the study, museum specimens and biodiversity records have historically misattributed spiny seahorses in the Indian Ocean to the H. histrix lineage. This research clarifies the identity of the previously documented but lesser-known Hippocampus jayakari and introduces a fifth species to the documented seahorse diversity of the Kerala coast.
The Discovery of Hippocampus amandavincentae
The newly identified species has been named Hippocampus amandavincentae, honoring the prominent marine biologist Amanda Vincent. Lead author Shalu Kannan first collected specimens of the creature from fish bycatch at the Tuticorin fisheries harbour. Beyond museum samples, the research team confirmed the species' presence in its natural habitat during field operations.
KUFOS Vice-Chancellor A. Biju Kumar reported that the seahorse was photographed alive during an Ecomarine project survey. The observation occurred at a depth of approximately 15 meters within the rocky reefs off Anchuthengu. This confirmation in the wild validates the taxonomic shift from purely theoretical classification to observed biological reality.
- The study reclassifies specimens formerly labeled as Hippocampus histrix into three separate species.
- Hippocampus amandavincentae represents the fifth seahorse species recorded along the Kerala coastline.
- Data suggests that previous distribution maps for the thorny seahorse were inaccurate due to these misidentifications.
Source: The Hindu — National
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