those kraata they are strange bugs but wat can dey do?¿?¿?¿?¿?

they're probably kinda like kanohi

But they also do resemble slug-like creatures and seem to have "eyes" and teeth or something like that, so they may also be like the Krana and Krana Kal as well.

I think that they are just krana that have been mutated by Makuta, so that if the rahkshi lose their staffs, then they are left with something to defend themselves with (along with brute strength of course).

Moving to Theories...

-KK