The zookeeper says that they are trying to make fat dolphins return to their best weight by offering them fewer mackerels and feeding them less fatty fish, to restore their ability to jump in the air as high as before. If mackerel made dolphins fat, what it does for humans?
As an oily fish, mackerel is not too high in calories, as it contains 205 Calories per 100 g, i.e. 1 1/3 cup of Coca Cola. For a human portion size and as a part of the daily food intake, it does not represent a problem for weight control, moreover, it is rich with the healthy omega fatty acids.
The problem with the dolphins is their weight and eating pattern (lifestyle?), since an adult dolphin weighs 175-237 kgs and eats approximately 8-15 kgs every day, if all its food is mackerel then it will produce 8000-15000 Calories per day, does it need that amount?
With empirical calculations comparing to humans, a dolphin would need 4850-6770 Calories per day. They pack dolphins with calories!
Do not follow dolphins and eat mackerel.
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Aquarium puts 'fat' dolphins on diet - ABC News (Australian Broadcasting Corporation)
Source : abc.net.au