Fish
Atlantic mackerel
Scomber scombrus
How to spot it
Steel-blue back with wavy black vertical bars; pencil-shaped body and a row of finlets before the tail.
Usually seen at
35-1010 m (median 110 m)
Size
Medium (10-50 cm)
Habitat
Midwater, Near surface, Open water
Behaviour
Schooling, Fast swim
Where it's seen
Occurrence records around the UK and north-east Atlantic (OBIS).