This stunning creature is a Tube Anemone, taken under actinic lighting only. Like other anemones, it can close up as it traps food. This is a popular creature for nano tanks, as they stay a nice size due to their very slow growth. Their base must be buried in the sandy substrate. They are filter feeders, and do not need large meaty foods. Rather, feed it twice a week with something tiny like Cyclop-eeze or other particulate foods. It is not a suitable host for clownfish. Reef-safe-ish.