- Pseudotiara tropica
- Pterocanium elegans
- Pterocanium praetextum
- Pterocanium trilobum
- Pterocorys hertwigii
- Pterocorys minythorax
- Pterocorys zancleus
- Pterocyrtidium dogieli
- Pterosagitta draco
- Pteroscenium pinnatum
- Pterosoma planum
- Pterotrachea coronata
- Pterotrachea hippocampus
- Pterotrachea scutata
- Pterygioteuthis giardi
- Ptychogastria polaris
- Ptychogena antarctica
- Ptychogena hyperborea
- Pulleniatina obliquiloculata
- Pylolena armata
- Pylospira octopyle
- Pyromaia tuberculata
- Pyrosoma aherniosum
- Pyrosoma atlanticum
- Pyrosoma ovatum
- Pyrosomella verticillata
- Pyrostephos vanhoeffeni
- Pyrostremma agassizi
- Pyrostremma spinosum
- Pyroteuthis margaritifera
- Randallia laevis
- Ranilia constricta
- Ranilia guinotae
- Ranilia muricata
- Raninoides laevis
- Ransonia krampi
- Rathkea africana
- Rathkea formosissima
- Rhabdonella amor
- Rhabdonella apophysata
- Rhabdonella chiliensis
- Rhabdonella cornucopia
- Rhabdonella spiralis
- Rhabdoon singulare
- Rhabdosoma armatum
- Rhabdosoma brevicaudatum
- Rhabdosoma minor
- Rhabdosoma whitei
- Rhacostoma atlantica
- Rhincalanus cornutus