# Hippopotamus mortality incidents

> Live situation record from CLSTR: https://clstr.news/situations/hippopotamus-mortality-incidents
> Updated: 2026-10-21T19:34:18.000Z. Sources: 6. Developments: 2.

In September 2026, several hippopotamus carcasses were discovered in the Semuliki River within the riparian zone of Virunga National Park in the Democratic Republic of the Congo. The Institut Congolais pour la conservation de la nature (ICCN) confirmed the deaths but noted the cause was unknown. Authorities initiated laboratory analyses and advised local residents to avoid contact with the carcasses or consuming meat from dead or ill animals.

In October 2026, a separate incident was reported at the Culiacán Zoo in Sinaloa, Mexico, where a three-year-old male hippopotamus named Motomoto died. Preliminary hypotheses suggested the animal may have suffered from endotoxic respiratory shock. Zoo administrators launched an investigation involving histopathological studies, while local officials called for a review of the facility’s care measures.

## Timeline

### 2026-10-21: Culiacán Zoo investigates death of male hippopotamus

Authorities are investigating the death of a three-year-old male hippopotamus at the Culiacán Zoo in Mexico, with endotoxic respiratory shock cited as a preliminary cause.

3 sources. https://clstr.news/cluster/culiacn-zoo-investigates-death-of-male-hippopotamus

### 2026-09-25: Hippopotamus carcasses discovered in Semuliki River, DRC

The ICCN is investigating the cause of death after several hippopotamuses were found dead in the Semuliki River in North Kivu, DRC.

3 sources. https://clstr.news/cluster/hippopotamus-carcasses-discovered-in-semuliki-river-drc

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Cite as: Hippopotamus mortality incidents. CLSTR, https://clstr.news/situations/hippopotamus-mortality-incidents