The species has a whitish spreading mycelium of branched, hyaline hyphae (thread-like filaments) some 2 to 4 μm wide.

The conidia (non-motile spores) are borne on specialized stalks called conidiophores which are hyaline, erect and 200 to 550 μm long.

[2] Arthrobotrys dactyloides has the ability to form rings of hypha that can constrict sharply and catch a nematode in the loop.

Now branches of hypha invade the nematode on either side of the loop and digest and absorb the soft tissues.

[3] Unlike some other species of nematophagous fungi which create sticky nets, A. dactyloides is able to form constricting ring-traps immediately after emerging from the conidia.