Calcareous sponge with encrusting crinoid from the Matmor Formation (Jurassic, Callovian) of the Makhtesh Gadol, Israel.
<a href="//commons.wikimedia.org/wiki/User:Wilson44691" title="User:Wilson44691">Wilson44691</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>