| Citation | Costello, D.P. and C. Henley, 1971 Methods for obtaining and handling marine eggs and embryos. Marine Biological Laboratory, Woods Hole, MA (Second Edition). |
| Ref. | 111140 Costello, D.P. and C. Henley, 1971 |
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| Named Used as Valid | Hydractinia echinata |
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| Distribution |