Each nipple sits inside a protective mammary slit, keeping the body hydrodynamic. The slits open only during nursing.
Powerful muscles surrounding the gland actively squirt high-fat milk (up to 60% fat) directly into the calf's mouth.
Whales have two mammary glands, one behind each slit, positioned on the underside between the navel and flukes.
Unlike land mammals, nothing protrudes. The entire system sits flush with the belly to minimize drag.
Extremely thick, paste-like consistency often compared to toothpaste or condensed cream. Fishy, oily flavor with a strong marine aroma. Not palatable to most humans.
Among the fattiest milk of any mammal — up to 10x the fat of cow's milk. Very high in calcium (~340 mg/100g) for rapid bone development. Rich in omega-3 fatty acids. Virtually no lactose, so it won't curdle in seawater.
High phosphorus and magnesium content supports skeletal growth. Contains significant vitamin A and D. Sodium levels are elevated compared to terrestrial mammals, reflecting the marine environment.
Milk is actively squirted under muscular pressure — calves don't suckle in the traditional sense. The extreme fat content keeps milk cohesive underwater and delivers maximum calories per nursing bout, which lasts only seconds.