Tony Wu / Hairy frogfish (Antennarius striatus) pair, male nudging spawning female's abdomen and pushing her into water column. Ariake Sea, Japan.

Tony Wu / Hairy frogfish (Antennarius striatus) male resting, lump on head and abdomen resulting from infection by Parasitic copepod (Sarcotaces pacificus). The female parasite resides within the lump where she...

Tony Wu / Hairy frogfish (Antennarius striatus) male resting, lump on head and abdomen resulting from infection by Parasitic copepod (Sarcotaces pacificus). The female parasite resides within the lump where she...

Tony Wu / Hairy frogfish (Antennarius striatus) male opening mouth, illicium / rod and esca / lure folded back on top of head. Skeleton shrimp (Caprellidae) parasites on fish's body. Ariake Sea, Japan.

Tony Wu / Hairy frogfish (Antennarius striatus) female on reef, Skeleton shrimp (Caprellidae) parasites on fish's body. Ariake Sea, Japan.

Tony Wu / Hairy frogfish (Antennarius striatus) male with esca / lure extended on illicium / rod to entice prey. Skeleton shrimp (Caprellidae) parasites on fish's body. Ariake Sea, Japan.

Tony Wu / Hairy frogfish (Antennarius striatus), fertilized raft of eggs floating in water after spawning. Ariake Sea, Japan.

Tony Wu / Japanese striped eel-catfish (Plotosus japonicus), school of juveniles feeding on cloud of plankton at night. Ariake Sea, Japan. September.

Tony Wu / Hairy frogfish (Antennarius striatus) pair after spawning, fertilized egg raft between the fish. Ariake Sea, Japan.

Tony Wu / Hairy frogfish (Antennarius striatus) pair, female spawning, releasing egg raft. Ariake Sea, Japan.

Tony Wu / Hairy frogfish (Antennarius striatus) female with abdomen swollen with eggs resting on reef, 16 hours prior to spawning. Ariake Sea, Japan.

Tony Wu / Hairy frogfish (Antennarius striatus) female releasing raft of eggs during spawning, male fertilizing eggs below. Ariake Sea, Japan.

Tony Wu / Hairy frogfish (Antennarius striatus) pair prior to spawning. Male positioned below female to push her into water column. Female is swollen to twice normal size in preparation for release of eggs maki...

Tony Wu / Hairy frogfish (Antennarius striatus) pair prior to spawning. Male positioned below female to push her into water column. Female is swollen to twice normal size in preparation for release of eggs maki...

Tony Wu / Hairy frogfish (Antennarius striatus) pair in reef, approximately 15 hours prior to spawning. Ariake Sea, Japan.

Tony Wu / Hairy frogfish (Antennarius striatus) pair on reef approximately 22 hours prior to spawning, female's abdomen swollen with eggs. Ariake Sea, Japan.