A dive fin 10 comprises a blade 12 and a foot pocket 14 which are distinct from one another and releasably connected to one another solely by a pair of rails 16 which extend between a leading edge 38 of the blade 12 and the foot pocket 14. The bars 16 extend parallel to one another from either side of the pouch 14 at least partway along the length of the blade 12 towards a trailing edge 30. Each rib 16 comprises a first section, extending from the leading edge 38 of the blade 12, and a second section extending from the foot holder 14. Both rail sections terminate in a free end. The free end of one rail section comprises a female recess 20, and the free end of the other rail section comprises a male extension 18 which can be inserted into the female cavity 20.
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