Male Jawfish with the Mouthfull of Babies

Yellow-headed jawfish, which are found on coral reefs in the Caribbean, are typically only seen with their heads and upper bodies protruding from their burrows - although occasionally they can be spied hovering a short distance from their territory.

After noticing the mouthbrooding fish, Dr Allinson, who specialises in underwater and hyperbaric medicine, waited 20 minutes to get a shot of it opening wide to aerate its brood.

Rotating the egg mass in this way keeps them clean and hydrated.

'The eggs being spit out is a very rare shot,' Dr Allinson said.