It´silvery all over, scaleless with a single dorsal spine.
Usual maximum lenght: 1.22 metres.
Mass: 5.25 kg.
Depth range: 10–374 metres.
Biogeography: Temperate or cold waters.
Habitats: Bottom dwelling; shallow sandy area; inshore or open ocean.
Food: small fish and invertebrates.
Reproduction: Egg cases
Behaviour: Shy.
Activity: Diurnal.
Longevity: 10 Years.
Minimum Population Doubling Time: 4.5–14 years.