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A sign that this nutrient release has started around A23a will be when vast phytoplankton blooms blossom around the iceberg.

Ash from forest fires can sometimes boost the growth of phytoplankton, the microscopic algae at the base of the marine food web, thanks to the infusion of nutrients from burned plants.

"This isn't just water like we drink. It's full of nutrients and chemicals, as well as tiny animals like phytoplankton frozen inside," Ms Taylor says.

Domoic acid is a neurotoxin released by Pseudo-nitzschia, a common phytoplankton species found in coastal waters.

The researchers do not yet know how the phytoplankton and zooplankton have been affected by this.