Marine Mammal Mortality on Kerala Coast Highlights Human‑Induced Threats
On 4 July 2026, beach‑goers at Kozhikode, Kerala, discovered a dead Indian Ocean humpback dolphin and an Indo‑Pacific finless porpoise. Veterinary officials recovered the carcasses for necropsy. The dolphin, weighing about 200 kg, had an empty stomach but a 2 kg plastic fishing net lodged in its oesophagus, causing death. The porpoise, about 80 kg, likely suffocated after entanglement in a net.
Key Developments
- Necropsy revealed a plastic net twisted into a ball in the dolphin’s oesophagus, preventing feeding.
- Porpoise death attributed to suffocation, probably from net entanglement.
- Experts link the incidents to rising plastic pollution and ghost nets along India’s coastline.
- Data from the CMFRI show 171 strandings in 2024 and 161 in 2025, with Goa and Kerala recording the highest numbers.
Important Facts
Between 2024‑2025, strandings involved 14 species. The humpback dolphin accounted for 129 cases (47 in 2024, 82 in 2025). Goa contributed 101 of these, Kerala 13, and Maharashtra 7. The finless porpoise was the second most stranded species with 98 cases.
Both species inhabit waters less than 20 m deep, making them especially exposed to fishing activities, litter, and tourism. The IUCN Red List classifies the humpback dolphin as endangered, underscoring the urgency of mitigation.
Exam Relevance
These events illustrate the intersection of biodiversity conservation, marine policy, and sustainable livelihoods – core topics for GS III (Environment & Ecology). Understanding the impact of plastic pollution and ghost nets helps answer questions on marine ecosystem health, coastal management, and the role of research institutions like CMFRI. The data also highlight gaps in state‑level monitoring, relevant for governance and policy‑making (GS II).
Way Forward
- Mandate systematic post‑mortems of stranded marine mammals and public release of findings to guide conservation actions.
- Strengthen coastal waste‑management to curb plastic pollution, especially single‑use soft plastics.
- Implement a national registry of ghost nets and promote retrieval programmes with fisher‑community participation.
- Enhance collaboration between fisheries departments, wildlife authorities, and NGOs for real‑time reporting of strandings.
- Educate coastal communities on the ecological and economic value of marine mammals to encourage responsible fishing practices.
Collective action by government, scientists, and citizens can reduce mortality, protect endangered species, and sustain the livelihoods that depend on a healthy marine ecosystem.