Striped dolphin, a species of dolphin in the family of dolphins, with a beak of equal length. Striped dolphins are capable of performing various aerial movements, such as jumping into water and colliding with water. There is a unique behavior of them, called 'tail turning', where they jump high and quickly rotate their tail leaves in front of water. This species was originally very abundant and is a common dolphin in the Pacific Ocean. In recent years, due to the deteriorating ecological environment, the population has sharply declined and urgently needs protection.

Also known as Atlantic Pilot Whale or Black Roundhead Whale, it is one of the two species in the Pilot Whale genus. Intermittent distribution in temperate and near polar regions of the northern and southern hemispheres. Long limbed pilot whales are a group of organisms that prefer to live in cold saltwater areas between 13-30 ℃. Diving depths range from 30-1800 meters, with significant variations, typically only active in the 30-60 meter water layer, and can last for several minutes. On June 16, 2017, in the Faroe Islands, a former Danish colony in Northern Europe, locals collectively hunted giant whales by the seaside, causing the seawater to be "dyed" red. According to statistics, the Faroe Islands slaughter over 950 giant whales annually, producing more than 500 tons of whale meat and blubber.