Darren asks, is this real?
I can't name the species (any ideas, Big Gary?), but it doesn't look implausible to me. So I'm going to say, Yes, it's probably real. But I won't upgrade that to definitely real until someone can identify the species.
It's a model of an ancient sea scorpion (a eurypterid
from the Ordovician era) made by Crawley Creatures
for the BBC show Sea Monsters
. The man posing with the model is the founder of Crawley Creatures, Jez Gibson-Harris.
I should note that the picture, in its original context, was not fake. It only became misleading once it was removed from this context and the creature was mistaken for a living specimen.
Thanks to Aryn, Andrew, and Big Gary for the quick identification.