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| Order | Family | English Common Name | Spanish Common Name | Portuguese Common Name | Scientific Name | |
| 1 | Sessilia | Balanidae | Barnacle | Diente de Perro | Balanus glandula | |
| 2 | Decapoda | Grapsidae | Southwestern Atlantic | Cangrejo Granuloso | Neohelice granulata | |
| 3 | Ocypodidae | Fiddler Crab | Cangrejo Violinista | Leptuca uruguayensis | ||
| 4 | Pisidae | Cangrejo Araña | Libinia spinosa | |||
| 5 | Platyxanthidae | Danielethus crenulatus | ||||
| 6 | Trichodactylidae | Cangrejo de Río | Dilocarcinus pagei | |||
| 7 | Varunidae | Cyrtograpsus altimanus | ||||
| 8 | Cangrejo de las Rocas | Cyrtograpsus angulatus |