Pair spawning by territorial male of pteragogus aurigarius

Group　spawning by non-territorial male of P.aurigarius

Streaking by non-territorial male of P.aurigarius

Territorial contest in male Chrysozephyrus smaragdinus

Spawning of "Luciola cruciata" (1); Simultaneous spawning by multiple females

Intrusion of cuckold male bluegill into spawning nest

Capturing paired female by egg-guarding male

the guard of eggs by paternal millipede, Brachycybe nodulosa Verhoeff

A pair of Eurasian Wigeons feeding by diving

Indiscriminate consumption of unrelated eggs by a gravid female and a satellite male in natural nests

Egg care of male three-spined stickleback Gasterosteus aculeatus

Predation on breeding pair of Ryukyu kajika frog by mudflat crabs

Spawning of Gnathopogon caerulescens on a gravel shore of Lake Biwa

Spawning of Gnathopogon caerulescens on a sandy shore of Lake Biwa

Spawning of Gnathopogon caerulescens on a gravel shore of Lake Biwa

Spawning of Gnathopogon caerulescens on a sandy shore of Lake Biwa

Spawning of Gnathopogon caerulescens on a rocky shore of Lake Biwa

Spawning of Gnathopogon caerulescens on a sandy shore of Lake Biwa

Nest defence against a brood parasite by a male Japanese bush warbler

Predation on breeding pair of Ryukyu kajika frog by sakishima odd-tooth snake

Spawning behavior of the Far Eastern catfish, Silurus asotus in paddy fields

Spawning behaviour of Pseudogobio esocinus (Cypriniformes, Cyprinidae) in an experimental tank

Egg-predation defense by the deception of a male three-spined stickleback Gasterosteus aculeatus

Egg eating by the natural nest den-master

Interruption of copulation by an intruding male