Third and final, the Hawaiian monk seal, which is a critically endangered species with about 1,100 monk seals remaining. Their diet consists of mainly bony fish and other minor food sources, including cephalopods and crustaceans. Hawaiian monk seals do not suffer from a low food population or human interference, but instead from themselves. The Hawaiian monk seals are not a genetically diverse species, so they cannot adapt well to changing environments, which is a key factor in the decline of their population. There is also an extremely uneven male to female ratio biased towards males. Due to this male gender bias ratio, a practice among the monk seals known as mobbing takes place. Multiple male monk seals attempt to mate with one single female, but end up attacking her and in the process, possibly killing her.