Tide bloom kills fishThis article was originally published in Foodnews
SCHOOLS of sardines in South Africa have been swimming into shallow water and perishing. This is thought to be due to a massive red tide bloom, Times Live reports. The article adds that the gills of the fish are not clogged, indicating that it is more likely that the sardines were trapped in shallow waters by the bloom, making them vulnerable to being chased by predators. Tide blooms also deplete oxygen levels in the water, which is fatal for the fish. South Africa exports mostly frozen sardines, shifting 16 054 tonnes last year.