invasive species

Russian Monster Salmon is Spreading in Sweden

It has a black tongue, a hump on its back and defends its mating grounds to the death - the invasive Russian humpback salmon has...
Text: Petra Hedbom/TT
Photo: Eva Thorstad/Norsk Institutt for naturforskning, Tom Staveley/SLU
Graphics: Johan Hallnäs/TT
01:13

Invasive species: Part 6 – Sargasso Snare

Sargasso seaweed, a brown algae, was initially discovered in 1985 in northern Bohuslän and has since become prevalent along the Swedish west coast....
Reportage: Lena Scherman
Photography: Göran Ehlmé
1:07

Invasive species part 5 – Clinging Jellyfish – alien but not invasive

In English the species name is "clinging jellyfish" in Swedish it is called “klängmedusa”....
Reportage: Lena Scherman
Photo: Tobias Dahlin
1:02

Invasive species part 2 – The comb jelly Mnemiopsis leydyi

The small but spectacularly beautiful comb jelly Mnemiopsis leydyi, can reproduce at a dismaying speed, and copes with warm and cold water and even different...
Reportage: Lena Scherman
Photo: Tobias Dahlin
1:38

Invasive species: Part 1 – The red lionfish

The most likely scenario is that the beautiful red lionfish spread into the sea off the coast of Florida when an aquarium was smashed by...
Reportage: Lena Scherman
Photo: Johan Candert, Göran Ehlmé
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