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: Anamalia Phylum: Annelida Class: Polychaeta
Kingdom: Animalia Phylum: Arthropoda Class: Crustacea
Crustacea.
The difference between the Class 365 and Class 465, 466 is basically the cost.
difference between inclusive and exclusive class interval