Florent's Guide To The

Tropical Reefs

Feather Hydroid
Gymnangium allmani
Feather Hydroid
Category: Hydroid
Scientific Name: Gymnangium allmani
Synonyms: Gymnangium longicaudum
Size: 4 to 12 in. (10 to 20 cm)  
Depth: 25-100 ft. (8-30 m)
Distribution: Caribbean
Cnidaria (Phylum)
└Medusozoa (Subphylum)
 └Hydrozoa (Class)
  └Leptothecata (Order)
   └Aglaopheniidae (Family)
    └Gymnangium (Genus)

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© 2025 Florent Charpin