beautiful photograph of one purple sea urchin on coral reef in the lisbon oceanarium, portugal.

actinia algae animal aquarium aquatic background beautiful beauty biodiversity close color colorful coral diving echinius echinoderm echinodermata echinoidea environment equina europe exotic fluorescent globular hedgehog lisbon marine mediterranean nature ocean oceanarium organism photograph plant portugal purple reef saltwater scuba sea seabed seafloor shallow soft spine spiny tropical underwater urchin vibrant