Angler Fish or Lophius piscatorius is a bottom living fish which can grow to 50kg. It can swallow things almost as large as itself by inflating its body with water. Known to take sea birds off the surface. Seriously over-fished and endangered, there are few left of this size and most that are seen and caught are immature and have not even had chance to breed. Sold incorrectly in shops and restaurants as Monkfish, which is a totally different species belonging to the shark family.
North Sea. St. Abbs Marine Reserve