Question: do humpback whales eat phytoplankton?
Answer: Humpback whales (like all baleen whales) are seasonal feeders and carnivores that filter feed tiny crustaceans (krill - mainly Euphausia superba, copepods, etc.), plankton, and small fish (including herring, mackerel, capelin, and sandeel) from the water. ... The humpbacks then eat a large, hearty meal.