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  • This is a male Pfeiffer's Top Shell (Tegula pfeifferi) engaged in broadcast spawning. Unlike the dramatic pulse ejection of eggs by females, males of this species dribble sperm into the water a little at a time, with frequent pauses.
    tegula-pfeifferi-top-shell-broadcast...tif
  • This is a female Pfeiffer's top shell (Tegula pfeifferi) engaged in broadcast spawning. Individuals of this species often move to an elevated position prior to spawning. When they are ready to broadcast gametes, the female gastropods raise themselves at an incline and eject eggs in a a series of foreceful pulses. Photographed in Kagoshima Prefecture, Japan.
    tegula-pfeifferi-top-shell-broadcast...tif
  • This is a Pfeiffer's top shell (Tegula pfeifferi) male engaged in broadcast spawning during the middle of the night. Photographed in Kagoshima Prefecture, Japan.
    tegula-pfeifferi-top-shell-broadcast...tif
  • This is a female Pfeiffer's Top Shell (Tegula pfeifferi) engaged in broadcast spawning. Having positioned herself in an elevated spot and raised herself to vertical orientation, the shell forcefully ejected clusters of green eggs three to four times in a row. She then reloaded and repeated for two additional rounds.
    tegula-pfeifferi-top-shell-broadcast...tif
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Tony Wu Underwater Photography

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