indemandradio on Instagram: "🐬 Something special spotted in the Mersey… A brilliant video has surfaced showing a common dolphin in the River Mersey, captured by Nathan from Harbourside Sea School — and we had to share it. Dolphins, porpoises and seals are known to pass through the Mersey, but official sightings are still rare. Every report helps build a clearer picture of the wildlife right on our doorstep 🌊 Via @mgenvtrust"