Ключевые слова: 2017, animal behavior, aquatic, asia, california, diving, dorid nudibranch, eggs, gills, hexabranchus sanguineus, hexebranchus, invertebrate, invertebrates, july, living organism, lying down, macro, manado, mating, mollusk, night dive, night time, north sulawesi, nudibranch, object, ocean, one animal, orange, outdoors, pacific, pulau bnagka, purple, red, scuba diving, sea, sea life, season, shawl, southeast asia, spanish, sulawesi, undersea, underwater photography,