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  • These are two mature male Asian sheepshead wrasses (Semicossyphus reticulatus) fighting over territory during the breeding season. There is a female swimming away from the males in the lower left corner of the frame. During this season, the mature males take on a whitish coloration, particularly when they are approaching female wrasses and when they engage in territorial disputes with other males. The male on the left in this image is Yamato, the dominant male in this area. He is the successor to Benkei. Wrasses are protogynous hermaphrodites, meaning that all individuals start life as females, then eventually turn into males.
    asian-sheepshead-wrasse-males-fighti...tif
  • This is a mature male Asian sheepshead wrasse (Semicossyphus reticulatus). The fish has taken on whitish coloration for the breeding season. During this season, the male mates with multiple females, and defends his terrority against other males. Wrasses are protogynous hermaphrodites, so this male, like all other males of this species, started life as a female.
    asian-sheepshead-wrasse-semicossyphu...tif
  • This is a juvenile Asian sheepshead wrasse (Semicossyphus reticulatus), easily recognized by the white lateral stripe against an orange-yellow background.
    asian-sheepshead-wrasse-juvenile-sem...tif
  • Pterogobius elapoides goby, known as kinubari in Japanese, against a background of bright-green seaweed that blooms in the spring.
    pterogobius-elapoides-seaweed-japan-...tif
  • Opisthocentrus tenuis, known as hanajiro-gaji in Japanese, relaxing in the middle of a spring bloom of bright-green seaweed. These coldwater fish are found in depths ranging from one to 300m.
    opisthocentrus-tenui-seaweed-backgro...tif
  • This is a male Asian sheepshead wrasse (Semicossyphus reticulatus) courting a female. Note the sexual dimorphism, with the male being larger than the female, which has a swollen belly, indicative of her readiness to spawn. These wrasses are protogynous hermaphrodites, meaning they all start life as females, then change to males. This image is licensed on an exclusive basis to BBC through 29 October 2021.
    asian-sheepshead-wrasse-courtship-se...tif
  • These are two mature male Asian sheepshead wrasses (Semicossyphus reticulatus) fighting over territory during the breeding season. During this season, the mature males take on a whitish coloration, particularly when they are approaching female wrasses and when they engage in territorial disputes with other males. The male on the left in this image is Yamato, the dominant male in this area. He is the successor to Benkei. Wrasses are protogynous hermaphrodites, meaning that all individuals start life as females, then eventually turn into males. This image is licensed on an exclusive basis to BBC through 29 October 2021.
    asian-sheepshead-wrasse-males-fighti...tif
  • These are two mature male Asian sheepshead wrasses (Semicossyphus reticulatus) fighting over territory during the breeding season. During this season, the mature males take on a whitish coloration, particularly when they are approaching female wrasses and when they engage in territorial disputes with other males. The male on the left in this image is Yamato, the dominant male in this area. He is the successor to Benkei, the previous dominant male. When Benkei died, Yamato took over. Wrasses are protogynous hermaphrodites, meaning that all individuals start life as females, then eventually turn into males.
    asian-sheepshead-wrass-males-fightin...tif
  • Juvenile Asian sheepshead wrasse (Semicossyphus reticulatus) with its mouth open
    asian-sheepshead-wrasse-juvenile-sem...tif
  • Pterogobius elapoides, a goby called kinubari in Japanese, swimming against a backdrop of bright-green seaweed that blooms in the spring.
    pterogobius-elapoides-seaweed-japan-...tif
  • Pseudoblennius zonostigma with fins on full display. This genus of sculpins is native to the northwest Pacific Ocean.
    pseudoblennius-zonostigma-sado-japan...tif
  • This is a mature male Asian sheepshead wrasse (Semicossyphus reticulatus). The fish has taken on whitish pastel coloration for the breeding season. During this season, the male mates with multiple females, and defends his terrority against other males. Wrasses are protogynous hermaphrodites, so this male, like all other males of this species, started life as a female.
    asian-sheepshead-wrasse-semicossyphu...tif
  • This is a mature male Asian sheepshead wrasse (Semicossyphus reticulatus). The fish has taken on whitish coloration for the breeding season. During this season, the male mates with multiple females, and defends his terrority against other males. Wrasses are protogynous hermaphrodites, so this male, like all other males of this species, started life as a female. At 100% magnification parasites attached to the fish’s face are visible.
    asian-sheepshead-wrasse-semicossyphu...tif
  • This is a mature male Asian sheepshead wrasse (Semicossyphus reticulatus) approaching two smaller female wrasses during the courtship season. Note that the bellies of the females are swollen with eggs, indicative of receptivity for spawning. The male takes on this pastel coloration for breeding and territorial competition with other males.
    semicossyphus-reticulatus-courtship-...tif
  • Pictured here is a mature male Asian sheepshead wrasse (Semicossyphus reticulatus) courting a smaller female wrasse. Note that the female’s belly is swollen with eggs, indicative of her receptivity for spawning. The male takes on this white coloration for breeding and territorial competition with other males.
    semicossyphus-reticulatus-courtship-...tif
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