Scientists from Fisheries and Oceans Canada made an exciting find off Vancouver Island: living eggs at the top of an active underwater volcano. This discovery changes what we know about this remote region and shows how volcanic heat can support unique marine life.
For years, experts thought this volcano was dormant. Surrounding waters seemed too cold for much life. But during a 2019 expedition led by marine biologist Cherisse Du Preez, researchers uncovered an unexpected treasure trove of marine activity, revealing the volcano as a vibrant haven for various species.
Among the most astonishing discoveries were giant eggs from the Pacific white skate. These eggs, nearly 1.5 feet across and nicknamed “mermaid purses” for their shape, were alive and developing. This stands in stark contrast to fossilized eggs found elsewhere, which are often millions of years old. The volcanic heat is likely crucial for their incubation, allowing the eggs to develop in an otherwise harsh environment.
The key to the survival of these eggs lies in the geothermal heat from the volcano. The Pacific white skate usually inhabits much colder waters, but the warm, mineral-rich water around the volcano speeds up the development process. Cherisse Du Preez referred to the volcano’s summit as “a coral garden and a safe nursery for juveniles,” highlighting just how vital this heat is for the species’ survival.
This isn’t just a unique case. Similar patterns have been observed in other volcanic areas. In 2018, scientists studying the Galápagos Islands noted that smaller eggs were also incubated near hydrothermal vents. While these eggs were smaller, they demonstrated the same idea: deep-sea species utilize volcanic heat to nurture their young.
The large size of the eggs found off Vancouver Island suggests that geothermal heat is even more significant for their development compared to smaller species. This information opens new research paths on how deep-sea organisms adapt to extreme conditions and underscores the role of geothermal environments in supporting marine life.
As researchers plan further explorations of this volcanic ecosystem, they hope to understand how these hotspots help species thrive in the depths of the ocean. Volcanic regions like this could play a crucial role in preserving biodiversity, especially as scientists continue to uncover the wonders of underwater life.