Black demon fish (Melanocetus johnsonii) are usually only found on the seabed, at depths of between 200 and 2,000 metres.
The species has a dark brown or black body, and a large mouth that's nearly vertical - with long pointed teeth.
Nightmarish 'black demon' fish is seen in broad daylight for the first time EVER - as baffled scientists spot one off the coast of Tenerife With a large, black body and a mouth full of fangs, it's no wonder this fish is known as the 'black demon'.
But scientists exploring the waters off the coast of Tenerife were in for a surprise, after spotting a creature at the surface for the first time.
'Emerging from the abyssal depths in vertical swimming, off just 2 km from the coast of Tenerife and during one of our pelagic shark research campaigns, @laiavlr spotted this creature on the surface,' Mr Boguna wrote.
