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Hydractinia altispina Millard, 1955 High-spined commensal hydroid  | 
 
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| Family: | Hydractiniidae () | |||
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| Environment: | pelagic; marine | |||
| Distribution: | Southeast Atlantic. | |||
| Diagnosis: | ||||
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| IUCN Red List Status: | Not Evaluated (N.E.) Ref. 123251) | |||
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| Country info: | 
	 
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