Southern Newfoundland Slope - Oceana Canada

Southern Newfoundland Slope

Scientific Expedition 2025

Overview

Canada Launches Deep-Sea Mission to Explore Southern Newfoundland Slope

Oceana Canada is embarking on a science-driven expedition to study the Southern Newfoundland Slope. This journey aims to deepen understanding of a rich but little-explored ecosystem. Findings from the mission will help build the scientific knowledge needed to support resilient and sustainable oceans.

Departing from St. John’s aboard the Polar Prince — owned by Miawpukek First Nation and Horizon Maritime Services Ltd. — the expedition team will travel more than 800 kilometres to survey underwater canyons, channels, and escarpments along the Grand Banks. The upwelling of deep, nutrient-rich waters in this region fuels vibrant marine life.

Why this mission matters

The Southern Newfoundland Slope is home to ancient corals, sea pens, and endangered species such as northern wolffish and smooth skate. Commercially important fish populations, including halibut and redfish, thrive here alongside rare species such as chimaeras. This region also provides habitat for marine mammals, including dolphins, pilot whales, and blue whales.

Massive underwater sea canyons, also known as submarine canyons, stretch more than 150 kilometres and plunge over 4,000 metres deep. They influence ocean currents and drive nutrient-rich waters upward to fuel phytoplankton — the foundation of marine food webs.

Despite the Southern Newfoundland Slope’s known ecological importance, much remains unexplored below 200 metres. Using a fibre-optic deep-sea camera system, scientists will map habitats, document biodiversity, and record environmental conditions to inform conservation and management decisions.

What the expedition will study

  • Collect data on the locations, depth and seafloor types of coral and sea pen habitats.
  • Document species that depend on these habitats.
  • Survey continental slopes and underwater canyons.
  • Survey biodiversity hotspots with dense coral colonies and expansive sea pens fields.
  • Map essential habitats for key fish populations.