The feeding structuresof a sperm whale

Norris, K. As they inhabit deep, offshore waters, they are perhaps less affected by these threats than more coastal species. The spermaceti organs may also help adjust the whale's buoyancy. Arnoux's beaked whale B. Plastic pollution when ingested will block the digestive tract and many animals killed in this way appear emaciated with poor body condition. Both population structure and migrations are poorly understood, yet there appears to be a general poleward movement in the summer months from mid latitudes.