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.