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.
Phylum Arthroropoda, class Crustacea.
Class: Crustacea Phylum: Arthropoda
they've all gills
Phylum Annelida of which there are three classes: Oligochaeta, Polychaeta, and Hirudinea.
The difference between the Class 365 and Class 465, 466 is basically the cost.
Crustacea.
Kingdom: Animalia Phylum: Arthropoda Class: Crustacea
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?
The price difference between first class and economy class tickets for this flight is 500.