Eli5: How does Oceanic gigantism actually work?

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Eli5: How does Oceanic gigantism actually work?

In: Biology

The theory of animal evolution called Cope’s rule which says when everything is equal animals tend to grow larger in successive generations so long as there is a plentiful supply of food. Basically given a choice in breeding partners animals will often select (or have no choice about selecting) the larger partner this size preference will be passed down the generations. – https://youtu.be/qVMCyMbUrgQ