| Undu bay | |
|---|---|
  Undu bay | |
| Coordinates | 58°27′51″N23°11′43″E / 58.4642°N 23.1954°E |
| Basin countries | Estonia |
Undu bay is a bay in Estonia. [1] It in the northern Gulf of Riga and is highly isolated. It is characterized by having muddy deposits, dense bottom vegetation, and low salinity. In 2005, an exotic species of crustacean, Gammarus lacustris , was identified in the bay. [2]
Acanthocephala is a group of parasitic worms known as acanthocephalans, thorny-headed worms, or spiny-headed worms, characterized by the presence of an eversible proboscis, armed with spines, which it uses to pierce and hold the gut wall of its host. Acanthocephalans have complex life cycles, involving at least two hosts, which may include invertebrates, fish, amphibians, birds, and mammals. About 1420 species have been described.
Gammarus is an amphipod crustacean genus in the family Gammaridae. It contains more than 200 described species, making it one of the most species-rich genera of crustaceans. Different species have different optimal conditions, particularly in terms of salinity, and different tolerances; Gammarus pulex, for instance, is a purely freshwater species, while Gammarus locusta is estuarine, only living where the salinity is greater than 25‰.
Gammarus lacustris is an aquatic amphipod.
Peipsiveere Nature Reserve is a nature reserve in Tartu County, Estonia, located around the estuary of the Emajõgi River, on the southwestern coast of Lake Peipus.
Nehatu Nature Reserve is a nature reserve in Pärnu County, Estonia. Its area is 1185.5 ha.
Vulbi Landscape Conservation Area is a nature reserve situated in Järva County, Estonia.
Vinni-Pajusti Landscape Conservation Area is a nature reserve situated in Lääne-Viru County, Estonia.
Loodi Landscape Conservation Area is a nature park situated in Viljandi County, Estonia.
Elva Landscape Conservation Area is a nature park situated in Tartu County, Estonia.
Hino Landscape Conservation Area is a nature park situated in Võru County, Estonia.
Järvevälja Landscape Conservation Area is a nature park situated in Ida-Viru County, Estonia.
Kiigumõisa Landscape Conservation Area is a nature park situated in Järva County, Estonia.
Kuimetsa Landscape Conservation Area is a nature park situated in Rapla County, Estonia.
Käina Bay-Kassari Landscape Conservation Area is a nature park situated in Hiiu County, Estonia.
Laulasmaa Landscape Conservation Area is a nature park is located in Harju County, Estonia.
Naissaar Landscape Conservation Area is a nature park that comprises the island of Naissaar in Harju County, Estonia.
Ohessaare Landscape Conservation Area is a nature park which is located in Saare County, Estonia.
Papiorg Landscape Conservation Area is a nature park in Viljandi County, Estonia.
Pilkuse Landscape Conservation Area is a nature park which is located in Rapla County, Estonia.
 | This Estonia location article is a stub. You can help Wikipedia by expanding it. |