| Bougainvilliidae () | 
	
		
	
	| 0.9 cm WD (male/unsexed) | 
| pelagic-neritic; marine; depth range 0 - 100 m | 
	
	
	
		| Arctic, Northern Atlantic and Pacific Ocean.  Mostly polar, but also subtropical and boreal. | 
	
		
	| Bell measures 10 mm high and wide; manubrium varies from pink to white, with 4 very distinctive dichotomously-branched oral tentacles; 4 radial canals; 4 tentacle bulbs, each bearing similar tentacles (<60) and with its own dark ocellus; transparent umbrella (Ref. 2376). | 
	
	
		| Neritic (Ref. 120409).  Found on bay and nearshore (Ref. 116013).  Colonial (Ref. 19).  Fairly short-lived, occurring in late spring or summer and feeding especially on barnacle nauplii; preyed on by Aequorea sp. and other medusivorous hydromedusae (Ref. 2376).  Also on hard substrate (Ref. 116013). | 
	
	
    | Not Evaluated (N.E.) Ref. 123251) | 
  
  
 		
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