Florent's Guide To The Florida, Bahamas and

Caribbean Reefs

Lined Flatworm
Prostheceraeus crozieri
Lined Flatworm
Also known as: Crozier's Flatworm, Tiger Flatworm
Category: Polyclad Flatworms
Scientific Name: Prostheceraeus crozieri
Synonyms: Pseudoceros crozieri, Cryptoceros crozeri, Maritigrella crozierae
Size: 1 to 2 in. (2.5 to 5 cm)  
Depth: 1-35 ft. (0-12 m)
Distribution: Caribbean, Bahamas, Florida
The juvenile lined flatworm has an orange fringe, which it will lose as an adult
Platyhelminthes (Phylum) Flatworms
└Polycladida (Order) Polyclad Flatworms
 └Euryleptidae (Family)
  └Prostheceraeus (Genus)
   └P. crozieri (Species)
WoRMS ID: 1353920🔗
iNaturalist ID: 962052🔗

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© 2026 Florent Charpin