| Common Name | Order | Genus/Species | # Species | Zone |
| Amphipod (tiny sprimp-like) | Amphipoda | Hyalella azteca | 1 | 2 |
| " | " | Caecidotea commuuis | 1 | 2,4 |
| " | " | Amphipod species | 3 | |
| Water flees | Cladocera | Cladocera species | 3 | |
| Tiny crustaceans | Copepoda | Calanoid species | 1 | |
| " | " | Copepod species | 1 | |
| Crayfish | Decapoda | Cambarus robustas | 1 | 2 |
| Pillbugs, woodlice | Isopoda | Armadillidium vulgare | 1 | |
| " | " | Oniscus asellus | 1 | |
| " | " | Trachelipus rathkei | 1 | |
| Seed shrimp | Ostracoda | Ostracod species | 3 | |
| First time recorded in Connecticut | ||||