肾形真叶珊瑚（学名：Euphyllia ancora）为葵珊瑚科真叶珊瑚属下的一个种。

Euphyllia ancora is a species of hard coral in the family Euphylliidae. It is known by several common names, including anchor coral, sausage coral, hammer coral, ridge coral, and bubble honeycomb coral.

This type of madreporial colony is easy to identify because of its puffy tubular tentacles with T-shaped tips. The coral is blue-gray to orange in color, sometimes with green on the tentacles. Colonies are usually no more than a meter across, but at times can reach several meters.