Mass Stranding of Seahorses in Odessa
A powerful storm from the southeast is the most likely cause of a mass stranding of seahorses on the Odessa coastline on January 27. The severe weather event resulted in a high concentration of dead specimens of the long-snouted seahorse (Hippocampus guttulatus), a species native to the Black Sea, washing ashore on the city's beaches. Seahorses are a charismatic and ecologically important species, making such events particularly concerning for marine biologists.
Water analysis conducted by scientists from the Institute of Marine Biology of the National Academy of Sciences of Ukraine found no evidence of toxic pollution. The likelihood of dangerous substances, such as hydrogen sulfide, being present was assessed as extremely low. All tested water parameters were within normal limits, including:
- suspended solids concentration
- total iron
- ammonium nitrogen
- nitrates
- phosphates
- dissolved oxygen
- biochemical oxygen demand
- pH level
- salinity
State of the Marine Environment
According to the State Environmental Inspection of the South-Western District, the density of dead seahorses in the area of the 9th-11th stations of the Great Fountain reached 35 individuals per square meter. The inspection continues to monitor the marine environment. The incident was likely caused by a combination of low water temperatures, the seahorses' limited mobility, a lack of natural winter shelters, and a high population density, which together led to them being torn from their substrate, washed ashore, and perishing.
This event highlights the vulnerability of marine fauna to natural conditions and climate shifts that can impact their habitat. Studying the causes of the seahorses' death and their population dynamics will be a priority, as preserving biodiversity in the Black Sea is a crucial aspect of the region's environmental policy.