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  • These delicate looking nudibranchs, Tenellia sibogae, are mating, surrounded by the stinging hydroids on which they feed. Once ingested, the hydroids' stinging cells are actually kept as live captives by the nudibranchs, transferred to the tips of their colorful cerrata for their own self-defense! Richelieu Rock, Thailand, Andaman Sea
    nb102.tif
  • A pair of Pharaoh cuttlefish, Sepia pharaonis, copulating. Within minutes of seperating, the female will begin depositing eggs, one at a time, in rocky crevices. During this process the male will maintain close contact witht the female in hopes of preventing competing males from mating with her. Richelieu Rock, Thailand, Andaman Sea, Indian Ocean
    cuttle47CPIX.tif
  • This pair of Indian Flame Basslets, Pseudanthias ignitus, are courting in mid-water, as they often do at dusk.  The female, above, pales in comparison to the vividly colored male, which displays its most brilliant coloration during such mating rituals.  The pair mated moments after this photo was taken, releasing eggs and sperm into the water column, to be taken wherever the current carried them.  Similan Islands Marine National Park, Andaman Sea, Thailand
    anth15CP.tif
  • A pair of Pharaoh Cuttlefish, Sepia pharaonis, mating.  Once finished, the female will deposit the fertilized eggs one at a time in rocky crevices. Richelieu Rock, Thailand, Andaman Sea
    cuttle45CP.tif
  • Sally Lightfoot crabs,  Grapsus grapsus, copulating near water's edge. Galapagos Islands, Ecuador
    crab84norm.tif
  • These attractive nudibranchs, Jorunna funebris, are copulating, surrounded by their favorite food, the blue sponge Haliclona sp.  Ko Tao, Thailand, Gulf of Thailand, South China Sea, Pacific Ocean
    nb250.tif
  • These colorful nudibranchs, Hypselodoris apolegma, are mating. Raja Ampat, West Papua, Indonesia
    20181215_RajaAmpat_0257.tif
  • A female Pharaoh cuttlefish, Sepia pharaonis, prepares to deposit her eggs in a rocky crevice as several males hover nearby. The dominant male maintains very close contact to prevent competing males from mating with her. Richelieu Rock, Thailand, Andaman Sea, Indian Ocean
    cuttle53CP.tif
  • A trio of male Pharaoh cuttlefish, Sepia pharaonis, compete for the attentions of a female.  The dominant male stays close to prevent a rival male from mating with her. Mergui Archipelago, Burma, Andaman Sea, Indian Ocean
    cuttle127CP.tif
  • Occasionally found in large numbers on beaches, and in this case underwater, these  shells are actually egg cases, made by female Paper Nautilus, Argonauta hians. The tiny male Argonauts have no shell and die soon after mating, while females live in these delicate shells, which also serve as egg cases until  their brood hatches, after which the females die and the shells are abandoned.  Similan Islands, Thailand, Andaman Sea, Indian Ocean
    argoshel1CP.tif
  • A pair of Risbecia pulchella nudibranchs snuggle prior to mating. Surin Islands Marine National Park, Thailand, Andaman Sea
    nb50LM-2.tif
  • A male Pharaoh Cuttlefish, Sepia pharaonis, maintains close contact with a female, below, to deny competing males an opportunity to mate with her. During such courtship rivalries, males display spectacular, rapidly changing color patterns, probably meant to intimidate their rivals. Richelieu Rock, Thailand, Andaman Sea, Indian Ocean
    cuttle89.tif
  • A female Pharaoh Cuttlefish, Sepia pharaonis, hovers near a rocky reef while 2 males compete for her attention. The dominant male maintains close contact with the female to deny competing males an opportunity to mate with her. During such courtship rivalries, males display spectacular, rapidly changing color patterns, probably meant to intimidate their rivals. Richelieu Rock, Thailand, Andaman Sea, Indian Ocean
    cuttle43.tif
  • A female Pharaoh Cuttlefish, Sepia pharaonis, reaches into a crevice to deposit eggs while 2 males compete for an opportunity to mate with her. During such courtship rivalries, males display spectacular, rapidly changing color patterns, probably meant to intimidate their rivals. In addition to threatening coloration, the dominant male in this photo has raised its center arms, exposing its parrot-like beak, also meant to discourage the rival male.  Richelieu Rock, Thailand, Andman Sea
    cuttle77CP.tif
  • A colorful nudibranch, Nembrotha kubaryana, stands tall, probably sampling scent trails to locate prey or a mate. Komodo National Park, Indonesia, Pacific Ocean
    nb501norm-2.tif
  • A female Pharaoh Cuttlefish, Sepia pharaonis, hovers near a soft coral (far left) while positioning herself to deposit one fertilized egg at a into a crevice to deposit eggs while 3 males compete for the chance to mate with her. During such courtship rivalries, males display spectacular, rapidly changing color patterns, probably meant to intimidate their rivals. Richelieu Rock, Thailand, Andaman Sea, Indian Ocean
    Cuttlefish Romance 16x20