A faunistic nature reserve on the Kashubian Coast on the Bay of Puck, at the mouth of the Reda River into the Baltic Sea, near the town of Beka, swallowed by the sea (the remains of this settlement are tall trees, stone foundations and a wooden cross on the shore of the Bay of Puck).
The reserve includes swampy halophilous (salt) meadows, changeably wet meadows and sedge flush fens, as well as rushes and dune formations.
A number of rare, protected or endangered species of halophilic plants can be found in salt meadows: Gerard's rush, seaside milkwort, sea warbler, seaside plantain, seaside bulrush, Tabernemontana's mollusc, russetaceae, common aster and salt aster. In turn, the meadow fed with fresh waters in the northern part of the reserve is a habitat of orchids, such as the stag beetle or Loesela's lilywort, as well as other strictly protected species of flora: the common swamp rot and the insectivorous plant butterfly.
The reserve area is a habitat of many rare species of birds - they have been observed breeding here: bittern, greylag, shelduck, common shelduck, marsh harrier, hen harrier, meadow harrier, spotted owl, green warbler, crane, oystercatcher, ringed plover, redshank, lapwing, snipe, tern white-fronted owl (disappeared after 1997 - due to excessive pressure from people visiting the reserve's beaches), kingfisher, marsh owl and lemon wagtail (nesting in the reserve since 1995).