This video says about itself:
Baby Humpbacks Need 150 Gallons of Whale Milk a Day
4 February 2016
Whale milk is some of the richest milk available to any mammal. A baby whale will drink 150 gallons of it a day to sustain its dramatic growth.
From Functional Ecology:
High suckling rates and acoustic crypsis of humpback whale neonates maximise potential for mother–calf energy transfer
1. The migration of humpback whales to and from their breeding grounds results in a short, critical time period during which neonatal calves must acquire suﬃcient energy via suckling from their fasting mothers to survive the long return journey.
2. Understanding neonate suckling behaviour is critical for understanding the energetics and evolution of humpback whale migratory behaviour and for informing conservation eﬀorts, but despite its importance, very little is known about the details, rate and behavioural context of this critical energy transfer.
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