Sperm whale research program, The Dominica Sperm Whale Project, has been in operation since 2005. The introduction of plastic waste to the ocean environment by humans is new. Sperm whales have occasionally been found with pieces of plastic in their stomachs. Sperm whale The sperm whale ("Physeter macrocephalus") or cachalot is the largest of the toothed whales and the largest toothed predator. It is the only living member of genus Physeter and one of three extant species in the sperm whale family, along with the pygmy sperm whale and dwarf sperm whale of the genus "Kogia". The sperm whale is a pelagic
Sei whale the largest mass beaching ever documented. The cause is not yet known; however, toxic algae blooms caused by unprecedented warming in the Pacific Ocean, known as the Blob, may be implicated. Sei whale The sei whale ( or ) ("Balaenoptera borealis") is a baleen whale, the third-largest rorqual after the blue whale and the fin whale. It inhabits most oceans and adjoining seas, and prefers deep offshore waters. It avoids polar and tropical waters and semienclosed bodies of water. The sei whale migrates annually from cool and subpolar waters in summer to winter in temperate and subtropical waters, with a