Gary Bell/ Oceanwide / Variegated Jawfish (Opistognathus solorensis) male brooding eggs in mouth, Anilao, Philippines

Gary Bell/ Oceanwide / Variegated Jawfish (Opistognathus solorensis) male brooding eggs in mouth, Anilao, Philippines

Alex Mustard / A male Yellow-headed jawfish (Opistognathus aurifrons) blowing out a clutch of eggs he has been incubating in his mouth in order to oxygenate them, East End, Grand Cayman, Cayman Islands, British West...

Alex Mustard / Banded jawfish (Opistognathus macrognathus) male incubating eggs in mouth, which are at a late stage of development and will soon be ready for release. West Palm Beach, Gulf Stream, West Atlantic Ocea...

Doug Perrine / Ring-eye jawfish male expels larvae after brooding eggs in mouth for a week {Opistognathus sp} Borneo (Non-ex).

Fred Bavendam / Spotfin Jawfish (Opistognathus sp) male protectively incubating a clutch of eggs in his mouth, Manado, North Sulawesi, Indonesia

Georgette Douwma / Gold specs jawfish male incubating eggs in mouth, unable to feed {Opistognathus sp} Sangalakki, Indonesia

Gary Bell/ Oceanwide / Variegated Jawfish (Opistognathus solorensis) male brooding eggs in mouth, Anilao, Philippines

Tony Wu / Jawfish (Opistognathus sp) looking around after spitting out sand and rubble to maintain burrow. Lembeh Strait, Celebes Sea, North Sulawesi, Indonesia.

Tony Wu / Jawfish (Opistognathus sp.) spitting out sand and stones to maintain its burrow. Lembeh Strait, Celebes Sea, North Sulawesi, Indonesia.

Tony Wu / Jawfish (Opistognathus sp.) spitting out sand and stones to maintain its burrow. Lembeh Strait, Celebes Sea, North Sulawesi, Indonesia.

Norbert Wu / Banded Jawfish (Opistognathus macrognathus) male incubating and aerating clutch of eggs, West Palm Beach, Florida