Kaiju Skinmite

Kaiju Skinmites are a parasitic creature from the Anteverse which live off bodies of Kaiju.

Biology
A Skinmite's function is said to be similar to that of a barnacle, piggybacking on the bodies of Kaiju either before or after they leave the Anteverse through the Breach.

They evoke the look of a mite or maggot. Their skin is a pale, cream-like color with a dark blue coloring that runs along their tops, with five black eyes. They have large, pincer-like mandibles on their mouths, which they use to stay latched onto Kaiju. They have a total of ten legs and move around relatively slowly.

Unlike the Kaiju, they are not particularly aggressive, as they are seen being handled by Hannibal Chau's workers with relative ease. They require ammonia to stay alive, which they probably acquire from their Kaiju hosts; should the Kaiju die, the mites will remain alive for a short period of time before dying off.

Source
Kaiju Skinmite