Christmas Tree Worm, an invertebrate that builds a tube into the coral, the only thing we see is its beautifully decorated head/antennae.
The head/antennae works like a net to catch tiny plankton that float by in the ocean currents. The antennae are also like gills, allowing the worm to breathe.
When the worm feels threatened (nearby movement) it will disappear down into its tube in the blink of an eye.
Great Site Leslie!!! Love the pics…
Thanks Mandy! I love these little critters- fun to watch them vanish so quickly.