Dolphin nipples sit inside protective mammary slits, kept flush with the body for hydrodynamics. The slits open only during nursing bouts.
Unlike land mammals, dolphins actively squirt milk under muscular pressure directly into the calf's mouth — no sustained suckling required.
Two mammary glands sit beneath the blubber layer, one behind each slit, on the ventral surface between the navel and genital slit.
Despite each bout lasting just 5–10 seconds, dolphin calves nurse for up to three years — dozens of times per hour while swimming alongside their mother.
Extremely thick and oily, resembling heavy cream infused with fish oil. Ivory to pale yellow in color with an intensely marine aroma. Near-zero lactose prevents the milk from dispersing in seawater.
Roughly 8–15× richer in fat than cow's milk. Very high in protein to support rapid muscle and organ development. Rich in omega-3 fatty acids including DHA, which is critical for the calf's brain development.
High calcium and phosphorus content supports rapid skeletal growth. Significant vitamin A supports vision development in an aquatic environment. Contains elevated sodium and iodine relative to terrestrial mammal milks.
Milk is actively ejected under muscular pressure — calves position their rostrum near the slit opening and receive short, forceful bursts. The extreme fat content allows maximum calories per nursing bout while the thick consistency resists dilution in seawater.