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Genus Chironephthya: Similar to sea fans, but lack central axis... and to Siphonogorgia, but polyps are able to retract to their own calyx. | Chironephthya sp. N. Sulawesi pic. | |
Genus Siphonogorgia: Superficially resemble Gorgonians. Polyps clustered toward ends of branches, absent from lower trunk, branches. No internal "axis" like sea fans. Can be completely withdrawn. Western Pacific; Philippines, Belau, Solomon Islands. Common on reef slopes, overhangs at times. | Siphonogorgia sp. Red Sea, Indo-Pacific. Plankton feeders like the true Sea Fans. Have erect two-dimensional branched colonies. Main stem and principal branches bear few polyps. Polyps vary in color per individual. To two feet in height. This one in the Red Sea. | 
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| Siphonogorgia sp. Fiji | 
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| Siphonogorgia sp. N. Sulawesi pix. |  
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