[1] Upogebia pugettensis has an elongated and broad abdomen, including a well-developed tail fin (uropods).

[2] Their burrows are important dwellings for many species, including the arrow goby, hooded shrimp, Scleroplax granulata, pea crabs, and clams.

This blood-sucking parasite can castrate females and has been shown to lower the weights of infested hosts by an average of 7.8%.

[5] Upogebia pugettensis is currently facing a serious threat from the non-native isopod parasite Orthione griffenis (Markham, 2004).

They then consume the blood of the host, which causes a metabolic burdening effect that greatly hampers reproductive ability.