Aquatic Invertebrates of Alberta
invasive species in Pakistan
Simple Invertebrates Sponges, jellyfishes and coral, flatworms, roundworms, and segmented worms too!
Phylum Annelida – Phylum and Class Characteristics Phylum Characteristics: coelomate body divided into segments (metameres) via septa; repeated arrangements.
Basics of Aquatic Macroinvertebrate Identification
