• Pegea confoederata
• Pelagia noctiluca
• Penilia avirostris
• Percnon abbreviatum Minami-togeáshi-gani
  
• Percnon planissimum Sally Lightfoot crab
  Togeashi-gani
  
• Perinereis cultrifera
• Perinia tumida Himeko-gani
  
• Periphylla periphylla
• Perisesarma bidens Futaba-kakugani
  
• Permanotus purpureus Murasaki-eumedona
  
• Petalomera acutidens Wagu-hiraáshi-kamuri
  
• Petalomera granulata Hiraáshi-kamuri
  
• Petalosarsia declivis
• Phalangipus filiformis Ashinaga-tsunogani-modoki
  
• Phalangipus hystrix Tsunogani-modoki
  
• Phalangipus longipes Andaman-áshinaga-tsunogani
  
• Phialella quadrata
• Phialopsis diegensis
• Philocheras bispinosus
• Philocheras echinulatus
• Philomedes brenda
• Philomedes lilljeborgi
• Philyra acutidens Chen-kobushi
  
• Philyra carinata Yokohama-mamekobushi
  
• Philyra heterograna Heritori-kobushi
  
• Philyra iriomotensis Iriomote-kobushi
  
• Philyra kanekoi Kaneko-kobushi
  
• Philyra misagoana Misago-kobushi
  
• Philyra nishihirai Okinawa-kobushi
  
• Philyra olivacea Hainan-kobushi
  
• Philyra pisum Mamekobushi
  
• Philyra platycheira Hirate-kobushi
  
• Philyra syndactyla Hira-kobushi
  
• Philyra taekoae Amami-mamekobushi
  
• Philyra tuberculosa Hongkong-mamekobushi
  
• Philyra yangmataoensis Santou-kobushi
  
• Philyra yangmataoensis chefooensis Chefoo-kobushi
  
• Phronima sedentaria
• Phymodius granulosus Tsubuhizume-ohgigani
  
• Phymodius monticulosus Ohhizume-ohgigani
  
• Phymodius nitidus Hime-hizume-ohgigani
  
• Phymodius ungulatus Ko-hizume-ohgigani
  
• Physachaeus ctenurus Ashinaga-ákeus
  
• Physalia physalis
• Physophora hydrostatica
• Picroceros armatus Onino-tsunogani
  
• Pilodius areolatus Tsubutoge-ohgigani
  
• Pilodius granulatus Stimpson-údewa-ohgigani
  
• Pilodius miersi Udewa-ohgigani
  
• Pilodius nigrocrinitus Toge-ohgigani