Custom Species Lists
- Ptilota filicina
- Ptilota serrata
- Ptilothamnionopsis lejolisea
- Pugetia cryptica
- Pugetia fragilissima
- Pugettia gracilis
- Pugettia producta
- Pugettia sp
- Pugettia sp.
- Pulsellum salishorum
- Punctaria chartacea
- Punctaria expansa
- Punctaria hesperia
- Punctaria latifolia
- Punctaria lobata
- Punctaria occidentalis
- Punctaria orbiculata
- Punctaria tenuissima
- Puncturella cooperi
- Pycnogonida
- Pycnogonum rickettsi
- Pycnogonum sp
- Pygospio californica
- Pygospio elegans
- Pygospio sp
- Pygospio sp N1
- Pylaiella gardneri
- Pylaiella littoralis
- Pylaiella tenella
- Pylaiella unilateralis
- Pylaiella washingtoniensis
- Pyropia abbottiae
- Pyropia brumalis
- Pyropia conwayae
- Pyropia fallax
- Pyropia fucicola
- Pyropia gardneri
- Pyropia kanakaensis
- Pyropia kurogii
- Pyropia lanceolata
- Pyropia nereocystis
- Pyropia perforata
- Pyropia pseudolanceolata
- Pyropia smithii
- Pyropia thuretii
- Pyropia torta
- Pyrulofusus harpa
- Pyura haustor
- Pyura sp
- Pyuridae
- Racomitrium aquaticum
- Ralfsia californica
- Ralfsia confusa
- Ralfsia fungiformis
- Ralfsia pacifica
- Raricirrus maculatus
- Retimohnia frielei
- Retimohnia sp
- Retusa obtusa
- Retusa sp
- Retusidae
- Rhabdocoela
- Rhabdus rectius
- Rhachotropis barnardi
- Rhachotropis clemens
- Rhachotropis oculata
- Rhachotropis sp
- Rhamphidonta retifera
- Rhamphostomella costata
- Rhepoxynius abronius
- Rhepoxynius barnardi
- Rhepoxynius bicuspidatus
- Rhepoxynius boreovariatus
- Rhepoxynius daboius
- Rhepoxynius pallidus
- Rhepoxynius sp
- Rhepoxynius tridentatus
- Rhizocaulus verticillatus
- Rhizoclonium riparium
- Rhizoclonium tortuosum
- Rhodine bitorquata
- Rhodochorton purpureum
- Rhodomela tenuissima
- Rhodonematella subimmersa
- Rhodophysema elegans
- Rhodophysema georgei
- Rhodophysema kjellmanii
- Rhodoptilum plumosum
- Rhodymenia californica
- Rhodymenia pacifica
- Rhodymeniocolax botryoidea
- Rhynchospio glutaea
- Rhynohalicella halona
- Rhyparochromus vulgaris
- Rictaxis punctocaelatus
- Rissoella alaskensis
- Rocinela americana
- Rocinela belliceps
- Rocinela propodialis
- Romaleon branneri