This is a male Korean seahorse (Hippocampus haema) hatching a juveniles after brooding them for somewhere between three and ten weeks. The adult is about 8cm in length. As they develop, the juveniles are curled up inside the brood pouch. Though some emerge straightened out, many are ejected in curled-up form, eventually unfurling, some soon after emerging, some sinking as they take time to adjust. Note that two of juveniles that have just emerged are still attached to the thin membrane from their egg cases. Described in 2017, this species is found in the waters of Korea, as well as along the southern and western coasts of Japan.
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