What animals live in the Baltic Sea?
Additionally, the Baltic Sea is home to many popular species such as marine mammals (harbor porpoise, ringed seal, grey seal, harbor seal), fish (salmon, sea trout, eel, pike) and waterbirds, which reside there constantly (herring gull) or during winter (long-tailed duck, little tern).
How many animals live in the Baltic Sea?
The Baltic Sea is home to about 2,700 macroscopic species and innumerable smaller microscopic species (Figure 5.0. 1). Around 1,600 macroscopic species are found in the Kattegat, which is the most marine sub-basin of the Baltic Sea.
How are invasive species introduced into the Baltic Sea?
The most probable vectors for non-indigenous species into the Baltic Sea are aquaculture and shipping (Galil et al. 2014). These species commonly attach to the ships hulls (so called biofouling) or are transported in ballast water and then released when the water is exchanged.
Are Sharks in the Baltic Sea?
Contrary to popular belief, there are sharks in the Baltic Sea. In fact, 31 species of sharks and closely related skates, rays and chimaeras (collectively known as cartilaginous fishes) have been recorded in this area.
Why is the Baltic Sea not salty?
Due to massive freshwater runoff from the land and limited salt water inflows from the Danish straits, the salinity of the Baltic Sea is much lower than that of the oceans, and the water is considered to be brackish water instead of sea water.
Why is the Baltic Sea Brown?
As the temperatures climb, melting snow swells the rivers that snake through the Baltic lowlands, sweeping dirt into the Baltic Sea. The sediment colors the water brown where the dirt is concentrated, and green, when it is dispersed.
Why are invasive species a problem in the Baltic Sea?
Why have invasive species increased in the Baltic Sea? The Baltic Sea has a low number of species, so invasive species quickly take over and upset the ecosystem. Which is the most tectonically active country?
Are any sharks invasive species?
Invasive Species: The Bull Shark.
Are there shark attacks in the Baltic Sea?
You really shouldn’t be afraid of a great white shark or any other big shark that may be dangerous to people. In fact, there hasn’t been any shark attacks recorded at any of the beaches in Poland! There you go!
Are there great white sharks in the Baltic Sea?
Why is the Baltic Sea dark?
The Baltic Sea is one of the most polluted bodies of water on Earth. Nutrient runoff causes algal blooms, depleting oxygen and making water dark and murky.
Why is the Baltic Sea so polluted?
Baltic waters are heavily contaminated with chemicals due to farming activities in the surrounding countries, as well as with oil products from spills. Thousands of tons of unused German chemical weapons have also been dumped in the sea after the Second World War.