
Diving with a species
The four sites for the perch lie in the Baltic and share its worst feature: between 5 and 8 metres of visibility. Three are wrecks — the eighteenth-century Vrouw Maria, with restricted access and technical certification; the Gdansk wrecks at 40 metres; and the Turku archipelago — and the fourth is Rügen, where people dive looking for amber.
Places come from reviewed species-place links; the species shown at each place are only those in this group.