This is a sequel to my earlier post:
One argument I've run across to prove that invertebrates aren't "alive" in the Biblical sense is Lev 17:11 (cf. Gen 9:4; Deut 12:23), which says the "life of the flesh is in the blood." Since invertebrates don't have hemoglobin, they aren't living creatures in the Biblical sense. But there are several problems with this line of argument:
i) To say life is linked to blood is not to say life can't be linked to something other than blood. It's an affirmation, not a denial. It's perfectly consistent with other things on which life is dependent. Indeed, creationists hardly think blood is a sufficient condition for biological life.
There's no reason to think the statement involves an intended contrast between hemoglobin and hemolymph. The context concerns sacrificial land animals (or human murder victims). It's not meant to be a universal principle.
Take a statement like "life depends on water." That doesn't mean life only depends on water. It doesn't stand in contrast to "life depends on oxygen," or "life depends on sunshine."
Likewise, it's dubious to think the Pentateuch is using "blood" in the technical sense of hemoglobin, as if the concept depends on how modern medicine defines the composition of blood. That's terribly anachronistic.
ii) This interpretation would restrict Gen 1:20-21 to the creation of aquatic vertebrates, leaving the creation of aquatic invertebrates unaccounted for. But surely this passage is meant to be an inclusive statement about the creation of organisms for whom water is their natural element. Gen 1 subdivides creation according to their native habitat: air, land, water. And young-earth-creationists, of all people, should wish to affirm that Gen 1 was meant to cover, in broad categories, the creation of natural kinds on planet earth. To omit aquatic invertebrates would be a massive lacuna.
iii) What is the function of blood? It's a vital fluid. That's why blood loss can result in death.
But for invertebrates, hemolymph is functionally equivalent to hemoglobin. Both are vital fluids, without which the respective organisms will expire. Just as life is in the hemoglobin for vertebrates, life is in the hemolymph for (some) invertebrates.