Glass sponge with an egg case most likely from a catshark found during Dive 4 of the Illuminating Biodiversity in Deep Waters of Puerto Rico 2022 expedition.  Catsharks use corals and sponges to lay their eggs, keeping them off the sedimented bottom.
Glass Sponge and Egg Case
Image courtesy of Illuminating Biodiversity in Deep Waters of Puerto Rico 2022.
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Glass sponge with an egg case most likely from a catshark found during Dive 4 of the Illuminating Biodiversity in Deep Waters of Puerto Rico 2022 expedition. Catsharks use corals and sponges to lay their eggs, keeping them off the sedimented bottom.