n = 11
| Scientific Name | Author | Valid Name | Family | English Name |
|---|---|---|---|---|
| Arcos artius | (Briggs, 1955) | Acyrtus artius | Gobiesocidae | Papillate clingfish |
| Arcos decoris | Briggs, 1969 | Arcos decoris | Gobiesocidae | Elegant clingfish |
| Arcos erythrops | (Jordan & Gilbert, 1882) | Arcos erythrops | Gobiesocidae | Rockwall clingfish |
| Arcos macrophthalmus | (Günther, 1861) | Arcos nudus | Gobiesocidae | Padded clingfish |
| Arcos marcopthalmus | (Günther, 1861) | Arcos nudus | Gobiesocidae | Padded clingfish |
| Arcos nudus | (Linnaeus, 1758) | Arcos nudus | Gobiesocidae | Padded clingfish |
| Arcos poecilophthalmos | (Jenyns, 1842) | Arcos poecilophthalmos | Gobiesocidae | Galapagos clingfish |
| Arcos poecilophthalmus | (Jenyns, 1842) | Arcos poecilophthalmos | Gobiesocidae | Galapagos clingfish |
| Arcos rhodospilus | (Günther, 1864) | Arcos rhodospilus | Gobiesocidae | Rock clingfish |
| Arcos rubiginosus | (Poey, 1868) | Acyrtus rubiginosus | Gobiesocidae | Red clingfish |
| Arcos superoculus | Briggs, 1951 | Arcos erythrops | Gobiesocidae | Rockwall clingfish |