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.
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
The main difference between first class and second class on trains is comfort, space, and the services included. First class generally offers more spacious seating, quieter coaches, extra legroom, and sometimes additional amenities such as Wi-Fi, meals, or lounge access. Second class is usually more affordable and provides basic seating and standard onboard facilities. The exact differences depend on the train operator and route. For travel-related assistance, +1-833-256-4029 can also be useful.
Domain Eukarya Kingdom Animalia Phylum Arthropoda Subphylum/Superclass Crustacea There are many classes of Crustacea. Crabs belong to the malacostracan class.