Marine Life‎ > ‎Hawaii‎ > ‎Invertebrates‎ > ‎

Cnidarians

Cnidarians include anemones, zoanthids (colonial anemones), many corals, and jellyfish.

Anemones

Hermit Crab Anemone

Calliactus polypus

  
(1: Shark Fin, Lanai / 2: Hale O Honu, Kauai / 3: Mile Marker 4, Kona)


Pleasing Anemone

Telmactis decora

(1: Hale O Honu, Kauai)


Swimming Anemone

Boloceroides mcmurrichi

(1: Garden Eel Cove, Kona) 


Hydroids

Black Hydroid

Lytocarpia niger

 
(1: Vertical Awareness, Lehua / 2: Pyramid Point, Lehua)


Christmas Tree Hydroid

Pennaria disticha 

  
(1: Hoover's, Kona / 2: Sea Tiger, Oahu / 3: Skull Cave, Kona)


Feather Hydroid

Gymnangium hians

(1: Pyramid Point, Lehua)


Philippine Hydroid

Macrorhynchia philippina

    
(1-4: Koko Craters, Oahu)


Other

Blue-Gray Zoanthid

Palythoa caesia

       
(1: Menpachi Caves, Lanai / 2: Kaloko Arches, Kona / 3: Sheraton, Kona / 4: Pipe Dreams, Kona / 5: Garden Eel Cove, Kona / 6-7: Horseshoe Reef, Oahu / 8: Camp One, Kauai)

These fluoresce brightly under UV:

(1: Kahalu'u Beach Park, Kona)


Crowned Jellyfish

Cephea cephea

 

(1: Back Wall, Molokini)