As nouns the difference between invertebrate and osmoconformer
is that invertebrate is an animal without vertebrae, ie backbone while osmoconformer is any marine invertebrate that maintains its internal salinity such that it is always equal to the surrounding seawater.
As an adjective invertebrate
is lacking a backbone.
osmoconformer
Noun
(
en noun)
any marine invertebrate that maintains its internal salinity such that it is always equal to the surrounding seawater