Yep!
It depends on what you want to find out about the echinodermatas. You can make phylogenia, palaentology, you can study its habits and so on, but at the end its all part of biology.
No, they are not decomposers.
Seagulls are not decomposers. They are consumers.
Macro decomposers are decomposers that yuo can see with the naked eye.
decomposers
Can you show me decomposers pictures of decomposers!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! ppppppppppppppppppppppppplllllllllllllllllllllllllllllllllllllllllllllllllllllllllleeeeeeeeeeeeeeeeeeeeeeeaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaasssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssseeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!eeeeee
Ospreys are not decomposers. They are consumers.
Shrews are not decomposers. But they are omnivores.
Corals are not decomposers. They are consumers.
Possums are not decomposers. They are consumers.
decomposers
Fungi are decomposers .