Phylum Cnidaria

See also Stony Corals

Zoanthids

 

HAWAII

Palythoa caesia

Makapu'u tidepool, Oahu

Makapu'u tidepool, Oahu

 

Makapu'u tidepool, Oahu

Makapu'u tidepool, Oahu

 

Makapu'u tidepool, Oahu

Makapu'u tidepool, Oahu

 

Makapu'u tidepool, Oahu

Makapu'u tidepool, Oahu

 

Haleiwa Trench, Oahu, 5 feet

RUBBERY or PILLOW ZOANTHIDS

Common in areas exposed to surge.  Polyps usually closed when the ocean is rough.  Color ranges from white to brown.  Texture resembles hard rubber.

Protopalythoa heliodiscus

Hanauma Bay, Oahu, 15 feet

Moku O Loe, Kaneohe Bay, Oahu, 3 feet

 

Haleiwa Trench, Oahu, 25 feet

 

Haleiwa Trench, Oahu, 25 feet

 

Moku O Loe, Kaneohe Bay, Oahu, 3 feet

 

 

 

 

TOADSTOOL ZOANTHIDS

Occasional on shaded vertical surfaces in shallow water.  Disc diameter up to 1.5 inches.  Color varies.

Protopalythoa sp.

Moku O Loe, Kaneohe Bay, Oahu, 3 feet

 

Makapu'u tidepool, Oahu

 

Moku O Loe, Kaneohe Bay, Oahu, 3 feet

 

Makapu'u tidepool, Oahu

 

Makapu'u tidepool, Oahu

 

Makapu'u tidepool, Oahu

Black Point, Oahu

 

 

 

TOADSTOOL ZOANTHIDS

Occasional on shaded vertical surfaces in shallow water.  These zoanthids are difficult to identify without dissection.  Disc diameter up to 1 inch.  Color varies.

Zoanthus sp.

Firehouse, Oahu, 15 feet

 

Sharks Cove, Oahu, 15 feet

Makapu'u tidepool, Oahu

 

Wailupe, Oahu, 3 feet

Wailupe, Oahu, 3 feet

 

Firehouse, Oahu, 20 feet

Firehouse, Oahu, 20 feet

MAT ZOANTHIDS

Fairly common on limestone reefs in shallow water.  Color varies from gray, blue, green, to pink.

Isaurus tuberculatus

Juvenile, Makapu'u tidepool, Oahu

 

Adult, Makapu'u tidepool, Oahu

Adult, Makapu'u tidepool, Oahu

 

TUBE ZOANTHIDS

Uncommon in shallow water under rocks or in shaded areas.  Reaches 3 or 4 inches.

 

 

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