Domoic acid toxicosis from harmful algal blooms causes neurological injury in California sea lions, requiring specialized rehabilitation and creating long-term welfare challenges for affected animals.
Domoic acid toxicosis causes acute neurological suffering — seizures, disorientation, and apparent distress — followed by permanent brain damage that affects quality of life for surviving animals. The welfare calculus for rehabilitation involves acute stabilization, assessment of neurological recovery potential, and honest evaluation of releasability. Animals with severe, permanent hippocampal damage face a welfare choice between long-term captive care — with the constraints that imposes on a highly mobile marine mammal — and humane euthanasia. Marine mammal rehabilitation facilities navigate these decisions using welfare assessment frameworks that weigh the quality of life achievable in captivity against the welfare cost of institutionalization for wild-origin animals.