The body is dark gray on the upper side and light gray on the belly with stripes of gray/blue and white.
Can dive between 200 to 700 m.
Temperate/tropical waters worldwide
Sharks and killer whales.
Off the US east coast they do no migrate. In Japan, they are migrating south in September and October to the East China Sea and return in April. In the Mediterranean they are migrating north during summer months and in the Ligurian Sea diurnal offshore-inshore movements were observed.
Social system/Group size
Varies with the regions. In Japan, groups of up to 100 individuals were most commen. They were devided in juvenile and adult groups (non-breeding and breeding).
They are hunted in Japan, the Solomon Islands and rarely in the Mediterranean. Another big threat is the entanglement in fishing gear, especially in the tuna drift-net fishery.
The most commonly found fish in their stomachs is the lanternfish.