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Britain is under threat from more than 66 alien plant and animal species headed our way, experts warn, including a monster seaweed and a killer catfish.
The ‘codium parvulum’ seaweed was recorded creating a giant mass weighing 6,000 tons off the coast of Israel.
Researchers - Animal - Plant - Species - Catfish
Now researchers warn it and other invasive animal and plant species - including a venomous catfish that has been known to kill humans - could be coming our way.
Other animals flagged up as posing a threat to native UK wildlife include the fox squirrel - the biggest squirrel in north America - which can bully and out-compete existing grey and red squirrels.
Interlopers - Rusty - Crayfish - Experts - Varieties
Another feared interlopers include the highly aggressive rusty crayfish which experts say could wipe out our domestic, endangered varieties of crayfish.
Topping the list is the Northern Snakehead - a Chinese fish that can even wriggle across mud - and is seen as a threat to domestic fish in the UK.
Razorsharp - Teeth - Behavior - Populations
With its razorsharp teeth and highly aggressive behavior it could easily decimate existing fish populations.
One of the fish was caught in 2008 on the River Witham in Lincolnshire - thought to have been illegally imported for an aquarium before being released.
Northern - Snakehead
Northern Snakehead are already...
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