Invertebrate and Moss animal

Invertebrate noun - Any animal lacking a backbone or notochord; the term is not used as a scientific classification.

Moss animal and invertebrate are semantically related. In some cases you can replace phrase "Moss animal" with "Invertebrate", this terms are similar.

Moss animal noun - Sessile aquatic animal forming mossy colonies of small polyps each having a curved or circular ridge bearing tentacles; attach to stones or seaweed and reproduce by budding.

Invertebrate and moss animal are semantically related. You can use "Invertebrate" instead a noun phrase "Moss animal".