Scientific Names
Species: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
| (Linked to Species Profile) | Samoan Name | Common Name | Park Status | Abundance | Residency | Nativity | Photo |
| Macrobrachium australe | koua river prawn | Present in park | Common | Breeder | Native | ||
| Macrobrachium hirtimanus | Present in park | Occasional | Breeder | Native | |||
| Macrobrachium lar | monkey river shrimp | Present in park | Common | Breeder | Native | ||
| Macrobrachium latimanus | mountain river prawn | Present in park | Common | Breeder | Native | ||
| Macrophiothrix longipeda | Probably present | Breeder | Native | ||||
| Marianina rosea | Probably present | Common | Native | ||||
| Metalpheus paragracilis | snapping shrimp | Probably Present | Breeder | Native | |||
| Melampus castaneus | Present in Park | Breeder | Native | ||||
| Melampus fasciatus | Present in Park | Breeder | Native | ||||
| Melampus luteus | Present in Park | Breeder | Native | ||||
| Melampus philippii | Probably present | Breeder | Native | ||||
| Melanoides lutosa | Present in park | Breeder | |||||
| Melanoides tuberculatus | red-rim melania | Present in park | Abundant | Breeder | Non-native | ||
| Mespilia globulus | Probably present | Breeder | Native | ||||
| Mycale grandis | mycale sponge | Probably present | Breeder | Native | |||
| Nassa serta | garland nassa | Probably present | Breeder | Native | |||
| Neoferdina cumingi | Probably present | Breeder | Native | ||||
| Nerita plicata | Present in park | Breeder | Native | ||||
| Nerita sp. | Probably present | Breeder | Native | ||||
| Neritina brevispina | Probably present | Occasional | Breeder | Native | |||
| Neritina canalis | Probably present | Breeder | Native | ||||
| Neritina turrita | Probably present | Breeder | Native | ||||
| Neritina variegata | Present in park | Breeder | Native | ||||
| Niso sp. | niso shell | Probably present | Breeder | Native | |||
| Notospermus tricuspidatus | Probably present | Common | Breeder | Native | |||
| Octopus sp. | fe'e | octopus | Probably present | Common | Breeder | Native | |
| Octopus cyanea | fe'e | day octopus | Probably present | Common | Breeder | Native | |
| Ocypode ceratophthalmia | avi'ivi'i, pa,a | horned ghost crab | Present in park | occasional | Breeder | Native | |
| Omphalotropis bifilaris | Present in Park | Breeder | Native | ||||
| Omphalotropis sp1 | Probably present | Breeder | Native | ||||
| Omphalotropis sp2 | Probably present | Breeder | Native | ||||
| Omphalotropis sp3 | Probably present | Breeder | Native | ||||
| Ophiarachna affinis | Probably present | Breeder | Native | ||||
| Ophiarachnella gorgonia | Probably present | Breeder | Native | ||||
| Ophiarthrum elegans | Probably present | Common | Breeder | Native | |||
| Ophiocoma brevipes | reticulated brittle star | Probably present | Breeder | Native | |||
| Ophiocoma doederleini | Probably present | Breeder | Native | ||||
| Ophiocoma erinaceus | spiny brittle star | Present in park | Common | Breeder | Native | ||
| Ophiocoma pica | pied brittle star | Probably present | Uncommon | Breeder | Native | ||
| Ophiocoma scolopendrina | Probably present | Breeder | Native | ||||
| Ophiocomella sexradia | Probably present | Breeder | Native | ||||
| Ophiolepis imbricatus | Probably present | Breeder | Native | ||||
| Ophiomastix mixta | Probably present | Breeder | Native | ||||
| Ophiomyxa australis | Probably present | Breeder | Native | ||||
| Ophionereis sp. | long-arm brittlestar | Probably present | Breeder | Native | |||
| Ophiopeza spinosa | Probably present | Breeder | Native | ||||
| Ophiothrix cf. trilineata | Probably present | Breeder | Native | ||||
| Orobophana musiva | Present in Park | Breeder | Native | ||||
| Orodoris miamirina | nudibranch | Probably present | rare | Breeder | Native | ||
| Ostodes adjunctus | Present in Park | Breeder | Native | ||||
| Ostodes strigatus | sisi | Present in Park | Breeder | Native | |||
| Ovachlamys fulgens | Present in Park | Breeder | Non-native | ||||
| Ovula ovum | Probably present | Breeder | Native | ||||
| Oxynoe viridis | Probably present | Breeder | Native | ||||
Species: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z