Traditional fishponds are typically formed in a hole in the ground. Material is sometimes used as a liner either to provide waterproofing and/or ground stabilisation. Pre-formed solid walled liners are also known which are at least partially buried in use in the ground. The invention provides a free-standing fish fishpond structure (10) comprising a flexible waterproof liner (20) and support means (30) for supporting at least a portion of the liner to form a wall, wherein the liner includes at least one integral substantially transparent portion. This enables the possibility of fishponds in situations where there is no access to suitable ground for the at least partial burial of a liner, or the creation of a hole. Moreover, it provides a relatively easily erectable, dismantleable and portable fishpond.
