Toxic Algae Bloom Causing Seizures in Sea LionsA giant algae bloom in the Pacific Ocean that runs from Southern California to Alaska is producing toxins that harm sea life. The bloom has already shutdown some clam and crab fishing along the Pacific coast, and the poison has moved up the food chain to attack mammals like sea lions.
■Class discussion: What causes algae blooms? Where else have they occurred? Studies warn that ocean life could face a mass extinction because of human activities. Could changes in the ocean threaten our survival? The sea is growing more acidic, and ocean acidification has been linked to the extinction of most life on earth about 250 million yeas ago. What causes the ocean to acidify?