Quick fact: Jawfish

A jawfish nurses a clutch of his own eggs in the shallow waters of the Philippines near Coron Island. 

The male fish incubates around 400 eggs inside his mouth but has to open it slightly for the water to circulate and provide oxygen for the eggs. Breeding with jawfish works when the female lays her eggs after which the male fertilises and incubates them in his mouth, a process called mouthbrooding. 

He will hide the eggs in a burrow while feeding on zooplankton as they float by.

Source: http://www.telegraph.co.uk/

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