Polychaete includes marine worms, crustaceans include crabs, lobsters, shrimps etc.
bristleworm
The three classes of Phylum Annelida are Polychaeta, Oligochaeta, and Hirudinea. Polychaeta are marine worms with bristles called chaetae, Oligochaeta include earthworms with few chaetae, and Hirudinea are leeches that are mostly freshwater and have suckers for attachment.
Class: Crustacea Phylum: Arthropoda
Phylum Arthroropoda, class Crustacea.
they've all gills
Phylum Annelida of which there are three classes: Oligochaeta, Polychaeta, and Hirudinea.
Crustacea.
Kingdom: Animalia Phylum: Arthropoda Class: Crustacea
The difference between the Class 365 and Class 465, 466 is basically the cost.
difference between inclusive and exclusive class interval
What is the difference between buying a 1st class and a 2nd class ticket on the train in England?
Domain Eukarya Kingdom Animalia Phylum Arthropoda Subphylum/Superclass Crustacea There are many classes of Crustacea. Crabs belong to the malacostracan class.