As mammals, dolphins need to rise to the surface to get enough air to breathe, but once they’re inside the fishing nets, they can’t swim anywhere. And trawling nets may remain in the water for several hours, according to Essemlali.
In most cases, the dolphins will drown in the nets. If they somehow survive, the fishermen will kill them on deck, rather than release them back into the ocean.
“They cut their fins and tail to remove them from the nets in order not to damage the nets,” Essemlali said. “Nets are very expensive. They prevail over the life of dolphins.”