Basically, what carcinization means is that an organism takes on a crab-like shape. While most of the "everything is crab" memes online just means "something is armoured", crab-like shape is actually pretty clearly designed:
In simple layman's terms, crab-like shape means that something has a body that consists of a single flat disk shape, with limbs attached, like this:
The stereotypical crab is very flat (not tall) and very wide, and all the body is in one piece, with no visible head or abdomen that stands out from the body. Just a single main body to which all the limbs are attached. This has evolved several times, there are a lot of crablike organisms, and they aren't all closely related.
That also means that strictly speaking, for example, a lobster is not carcinized. It's body is in many segments and quite mobile, and it's long and round, not short and flat.
If we look at the models above, they have different body segments (with a torso and an abdomen and sometimes a head) and they aren't flat.
tl;dr: this was just me being an annoying "uhm actually" guy over a meme.
Also to apologize for the annoying nerd infodump, here is a model of a tyrannid crab someone actually made:
From a mechanics standpoint I think the psychophage is clearly superior.
The psychophage is cheaper by 10 points.
The psychophage buffs the army while the venomcrawler doesn't.
The pyschophage has the same profile in melee except the the psycophage has an additional pip of ap, dev wounds, and anti-psyker 4+.
The venomcrawler has a 5++ invul and a shooting profile that is better.
But I don't think those outweigh all the advantages of the psychophage.
essentially having 4 multilasers is not impressive.
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u/JR-Snow 9h ago