Southeast Atlantic: endemic to South Africa. Hippocampus capensis has the smallest known range of any seahorse and was the first to be assessed as threatened on the IUCN Red List, in 1994. International trade is monitored through a licensing system (CITES II, since 5.15.04) and a minimum size of 10 cm applies.
- Dawson, C.E. 1986 Syngnathidae. p. 445-458. In M.M. Smith and P.C. Heemstra (eds.) Smiths' sea fishes. Springer-Verlag, Berlin. (Ref. 4281) http://www.fishbase.org/references/FBRefSummary.php?id=4281&speccode=16862
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