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  • This is a female Radulinopsis derjavini sculpin hatching her clutch of eggs by agitating them with her mouth. Females of this genus tend to their eggs, using their specialized mouths to suck or vacuum water across the developing juveniles to aerate them. In other sculpin genuses, males take responsibility for nurturing eggs.
    radulinopsis-derjavini-sculpin-eggs-...tif
  • This is a female Radulinopsis derjavini sculpin attending to a clutch of eggs that are on the brink of hatching. Females of this species extend their mouths to suck on the eggs in order to clean and aerate them. The eggs hatched about 15 minutes after this photo was taken.
    radulinopsis-derjavini-sculpin-with-...tif
  • This is a female Radulinopsis derjavini sculpin hatching her clutch of eggs by agitating them with her mouth. Females of this genus tend to their eggs, using their specialized mouths to suck or vacuum water across the developing juveniles to aerate them. In other sculpin genuses, males take responsibility for nurturing eggs.
    radulinopsis-derjavini-sculpin-eggs-...tif
  • This is a close-up view of a female Radulinopsis derjavini sculpin, showing her specialized wide-mouth, which is used to aerate developing eggs by sucking water over and around them. This female had just finished hatching a clutch of eggs. Photographed at two times life-size magnification.
    radulinopsis-derjavini-sculpin-japan...tif
  • This is a female Radulinopsis derjavini sculpin with a clutch of eggs that are in the process of hatching. The juveniles are only a few millimeters in size. Some of the newly hatched fish can be viewed at 100% magnification.
    radulinopsis-derjavini-sculpin-hatch...tif
  • This is a female Radulinopsis taranetzi sculpin attending to a clutch of eggs, which are attached to a rock. The fish extends her mouth and sucks on the eggs to keep them clean and aerated.
    radulinopsis-taranetzi-sculpin-with-...tif
  • This is a female Radulinopsis taranetzi sculpin tending to her clutch of eggs. Females of this species extend their mouths into the wide shape pictured here to suck or vacuum water around the eggs in order to aerate them and keep them clean and healthy. When the time comes, vigorous vacuuming helps the juveniles to hatch. The eggs pictured here are well-developed, only a few days from hatching.
    radulinopsis-taranetzi-sculpin-nurtu...tif
  • This is a pair of Radulinopsis taranetzi sculpins copulating, with the male on top. Internal fertilization takes place in this species, with the female depositing her clutch of eggs after choosing a suitable location, then covering them with sand and rubble. Females of this species use their wide mouths to suck water over the eggs in order to aerate them.
    radulinopsis-taranetzi-sculpins-copu...tif
  • This is a pair of Radulinopsis taranetzi sculpins preparing to copulate, with the male on top. Internal fertilization takes place in this species, with the female depositing her clutch of eggs after choosing a suitable location, then covering them with sand and rubble. Females of this species use their wide mouths to suck water over the eggs in order to aerate them.
    radulinopsis-taranetzi-sculpins-copu...tif
  • This is a female Radulinopsis taranetzi sculpin attending to a clutch of eggs, which are attached to a rock. The fish extends her mouth and sucks on the eggs to keep them clean and aerated.
    radulinopsis-taranetzi-sculpin-with-...tif
  • This is a female Radulinopsis taranetzi sculpin carrying a bellyful of fertilized eggs. She is in the process of choosing a place to deposit the eggs, which she will then cover with sand and rubble. Females of this species use their wide mouths to suck water over the eggs in order to aerate them and care for the eggs until they mature and hatch.
    radulinopsis-taranetzi-sculpin-pregn...tif
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