One and natural attractions of the Kamchatka Peninsula is a picturesque Semyachiksky estuary, which is located at the southern boundary of the Kronotsky reserve, near the village Supanova.

The total area of this well-warmed, shallow water body is over 780 hectares. Semyachiksky the estuary formed by the threads of the Kronotsky Bay and several rivers.

The pond is filled with thermal waters, also well observed tidal currents. During low tide, large areas of open shallow waters, which are rich in food habitats of many species of wetland birds. Extensive swampy shores of the estuary is a great place for nesting birds. Nesting birds such as Kamchatka tern, river gulls and terns, various species of ducks, waders and many other wetland birds. Spring is here at rest stops about 10 thousand species of birds, and in the fall more than 14 thousand In the basin of the reservoir is still winter up to 1250 species of Anseriformes.

Moderate water temperature and its favourable chemical composition contributed to the formation of different biological organisms. Due to its thermal springs, the banks of the estuary throughout the year are filled with diverse populations of molluscs and insects.

Semyachiksky estuary is among the most important wetlands that are of national importance. As part of the reserve, the pond is considered a site of special scientific value.

Semyachiksky estuary is traversed for spawning salmon: malma and congee. Here also come the saffron cod and smelt. Huge quantities of fish attracts many fish-eating birds and animals, such as otters and bears, Steller's sea eagles, foxes. Autumn and winter at the mouth Shemachinskoe estuary satisfied with their rookeries Larga. On the lip that separates the estuary from the sea, lies a whole berry box – sweet Paradise for bears.