Overall, the populations of all three marine mammals rose over the 12-year period, though seals began as the most numerous while dolphins ended the period with by far the highest count. Dolphins exhibited the most dramatic growth, increasing more than fivefold, whereas seals and whales showed more moderate, though still consistent, upward trends.
In 2006, seals were the most abundant species, with approximately 27 individuals, compared to around 15 whales and only 10 dolphins. Over the following four years, seal numbers climbed steadily to roughly 40, while both whales and dolphins rose more modestly to about 20 and 15 respectively.
By 2014, seal numbers had dipped slightly to around 35, interrupting their earlier upward trajectory, whereas the populations of whales and dolphins continued to grow steadily, reaching approximately 25 and 20 individuals. This marked the point at which dolphins began to close the gap with the other two species.
The most striking development occurred by 2018, when all three populations reached their peaks. Dolphins surged to 55 individuals, overtaking seals (which recovered to just under 50) to become the most numerous species. Whales recorded the lowest figure of the three at 30, having increased incrementally throughout the period.