velvet dogfish, smooth and deep-water slow

Size
Length: 60–80 cm, Weight: 3–6 kg
Lifespan
20–30 years
Diet
Small fish, squid and crustaceans. Hunts near the seafloor in deep, dark waters. Uses electroreception to locate prey. Feeds on whatever drifts within range. Swims with a slow, energy-efficient motion.
Habitat
Deep continental slopes and seamounts between 200 and 1,000 metres depth. Prefers muddy and sandy bottoms with stable, cold temperatures. Often found near the seafloor in the darker waters of the continental slope.
Range
Deep waters around New Zealand from Northland to the Campbell Plateau. Most common on the Chatham Rise and off the west coast of the South Island. Also found in the Atlantic, Indian and Pacific Oceans.
Endemism
Native
Main Threats
Bycatch in deep-sea trawl and longline fisheries is the primary threat. Habitat damage from bottom trawling on seamounts. Slow reproduction makes populations vulnerable. No targeted commercial fishery exists in New Zealand waters.
Population
Population trends are poorly understood due to the species' deep-water habitat. It is caught as bycatch in target fisheries for orange roughy and oreo. New Zealand's quota management system limits total bycatch. Its slow growth means recovery takes decades.
Conservation Status
Not Threatened
Touch it. It feels like velvet. That is the first surprise. The velvet dogfish is named for its soft, velvety skin, which is covered in tiny, delicate denticles that give it a smooth, almost furry texture. Unlike the rough, prickly skin of other dogfish species, this shark has a smooth, slippery feel. Run a hand along it. It does not scratch. It caresses. A shark that feels like a luxury. The texture is deceptive. It lives in the dark waters of the deep continental slope, hovering near the seafloor in search of slow-moving prey. Fish, squid and crustaceans form the diet. Nothing too fast. Nothing too fancy. The deep sea does not reward speed. It rewards patience. The strategy is energy conservation. Movement is minimal. Its large, green eyes are adapted for the dim light of its deep habitat. Two hundred to six hundred metres down, sunlight never reaches. The only light comes from bioluminescent flashes. A shark that sees in the dark. A shark that has never seen the sun. The adaptation is total. Vision is tuned to the faintest glow. It is rarely seen by humans, living in waters deeper than 200 metres. The deep sea is vast and expensive to explore. The velvet dogfish lives there, unseen, unknown and unbothered. Or it was unbothered. Then the trawlers came. The intrusion is industrial. The impact is silent. The Māori name is not recorded. It lives too deep for traditional fishing. The people who came before never saw it. It is a modern discovery, a deep-sea ghost, a shark that feels like silk and dies like an accident. The history is short. The future is uncertain. Populations are poorly understood. That phrase appears again. The deep sea is vast and expensive to study. The velvet dogfish is caught as bycatch in deep-sea trawl and longline fisheries targeting hoki and oreo. No one targets it. But it dies in the nets anyway. The collateral damage is high. Slow reproduction makes it vulnerable. Even low levels of bycatch can cause declines that take decades to reverse. The biological clock ticks slowly. Recovery is not guaranteed. The margin for error is thin. That is the velvet dogfish. Soft, velvety and living in the dark. A shark that feels like a luxury, lives like a ghost and dies like an accident. The contrast is stark.