smooth brittle star - ophioderma longicauda

animals biology animal kingdom natural world outdoor outdoors zoology ocean life italy snorkel beach snorkelling long macro scene closeup oceanographic oceanographer brittle-star undersea brown brittle star bottom nature serpent strait underwater dwellers sea blanes echinodermata saltwater snorkeling ophiura seafood biodiversity stars environment fish ophiuroids fragility echinoderms fauna color summer brittlestars inverts seawater tentacles water ophiuroid arms creature seastar aqua wild aquatic mediterranean wildlife marine echinoderm scuba starfish dive ophioderma longicauda ophiuroidea invertebrates tidal shallow europe invertebrate colorful seas