Sponges are the simplest many-celled animals. Their shapes vary from tiny cups, broad branches, or tall vases to encrustations and large, rounded masses. Sponges can range in color from bright hues in shallow waters to deeper water grays and browns.
Sponges are the simplest many-celled animals. Their shapes vary from tiny cups, broad branches, or tall vases to encrustations and large, rounded masses. Sponges can range in color from bright hues in shallow waters to deeper water grays and browns.