Vincent, A.C.J. 1996. International Trade in Seahorses. Vincent, A.C.J. October 1994. The improbable seahorse. Vincent, A.C.J. February 1994.
Seahorses exhibit conventional sex roles in mating competition, despite male pregnancy.
Vincent, A.C.J. 1989. Pregnant males and seahorse tails. Whitley, G. and J. Allan. The Sea-Horse and its Relatives. The Griffin Press.