Suppose there is a lot of food resource, parents may expend more time managing to their young because searching of food for themselves takes it is less time and energy consuming.
The parental care in clownfishes is especially the periodic fanning of the eggs by males and females, mugging of the eggs and extracting the unfertilized and unwell eggs.
Thus, it is less time and energy consuming and can give more time in parental caring.
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