Use your Critter Chart and textbook to help you find the important morphological features of each group. 1. Modern desmosponge. Find the pores, and notice the thread-like spicules made of protein.

Monorhaphis chuni is a deep-sea sponge that creates giant basal spicules (GBS) that can reach up to 3 meters in length and 10 millimeters in diameter. These spicules are the largest biogenic ...