CONTENTS 



Introduction 1 



Invertebrates - General 2 



Ecological information 3 



General 3 



Benthos and the sargassum community 3 



Plankton 4 



Phylum Porifera 5 



Phylum Cnidaria 5 



Classes Hydrozoa and Scyphozoa 5 



Class Anthozoa 6 



Phylum Ctenophora 7 



Phylum Platyhelminthes 7 



Class Turbellaria 7 



Class Trematoda 8 



Class Cestoda 9 



Phylum Nemertea 9 



Phylum Gnathostomulida 9 



Phylum Gastrotricha 9 



Phylum Nematoda 10 



Phylum Nematomorpha 10 



Phylum Kinorhyncha 11 



Phylum Rotifera 11 



Phylum Acanthocephala 11 



Phylum Annelida 11 



Class Polychaeta 13 



Class Myzostomaria 13 



Class Archiannelida 13 



Class Oligochaeta 13 



Class Hirudinea 13 



Phylum Sipuncula 13 



Phylum Echiura 14 



Phylum MoUusca 14 



General 14 



Class Gastropoda 15 



Class Scaphopoda 16 



Class Aplacophora 17 



Class Polyplacophora 17 



Class Pelecypoda 17 



Class Cephalopoda 18 



Phylum Arthropoda 18 



Class Pycnogonida 18 



Class Merostomata 19 



Classes Chilopoda and Diplopoda 19 



Class Arachnida 19 



Class Insecta 19 



Class Crustacea 20 



Subclass Branchiopoda 20 



Subclass Cephalocarida 20 



Subclass Mystacocarida 20 



Subclass Ostracoda 20 



Subclass Copepoda 21 



Subclass Branchiura 23 



Subclass Cirripedia 23 



Subclass Malacostraca 23 



Superorder Peracarida 23 



Order Mysidacea 23 



Order Isopoda 24 



