London
Observer description: Saw 3 times in 10 mins popped up and disappeared then reappeared
Source: ZSL Thames Marine Mammal Survey, report 5691 — https://sites.zsl.org/inthethames/main/
17 May 2026 · LondonUnited Kingdom · North Atlantic
United Kingdom · stories
From the public record.
Read recent published observations from the United Kingdom. Each entry keeps its original source attribution and a link back to the archive.
London
Observer description: It was facing downstream as the tide was receding and floating with the tide. It turned its head and then went under the water.
Source: ZSL Thames Marine Mammal Survey, report 5692 — https://sites.zsl.org/inthethames/main/
17 May 2026 · LondonLondon
Observer description: Large dead seal floating at edge of river. Appeared to be upside down.
Source: ZSL Thames Marine Mammal Survey, report 5690 — https://sites.zsl.org/inthethames/main/
11 May 2026 · LondonLondon
Observer description: Sadly it was dead about 30 m from The water
Source: ZSL Thames Marine Mammal Survey, report 5688 — https://sites.zsl.org/inthethames/main/
06 May 2026 · LondonLondon
Observer description: I sew the seal come up from the water in the river at Bishops park it came up a few times followed it down the river for around 10 minutes until I had to turn around and go back to work
Source: ZSL Thames Marine Mammal Survey, report 5689 — https://sites.zsl.org/inthethames/main/
06 May 2026 · LondonLondon
Observer description: It was swimming around going up the river..dark grey with dark nose..i saw its head
Source: ZSL Thames Marine Mammal Survey, report 5686 — https://sites.zsl.org/inthethames/main/
03 May 2026 · LondonLondon
Observer description: Copper colored
Source: ZSL Thames Marine Mammal Survey, report 5687 — https://sites.zsl.org/inthethames/main/
03 May 2026 · LondonLondon
Observer description: Head multiple times surfacing and diving with large fish in its mouth. Observer notes: It was feeding on a large fish.It surfaced and dived mulyiple times and I watched all the way to Chiswick Ayot It seemed like a very large seal.
Source: ZSL Thames Marine Mammal Survey, report 5683 — https://sites.zsl.org/inthethames/main/
01 May 2026 · LondonLondon
Observer description: Definitively rounded head..grey seal . Large. Observer notes: I reported this yesterday and must have hit the wrong button asit came up on your report as a harbour seal. The grey seal must have just caught the fish and kept surfacing with it in its mouth.
Source: ZSL Thames Marine Mammal Survey, report 5685 — https://sites.zsl.org/inthethames/main/
01 May 2026 · LondonLondon
Observer description: Seal for sure
Source: ZSL Thames Marine Mammal Survey, report 5682 — https://sites.zsl.org/inthethames/main/
01 May 2026 · LondonLondon
Observer description: Seal with a bigger muzzle Observer notes: I have taken screenshots from the video please let me know if you want the video and I will share it with you
Source: ZSL Thames Marine Mammal Survey, report 5684 — https://sites.zsl.org/inthethames/main/
01 May 2026 · LondonLondon
Observer description: Relaxed, swimming upstream, surfacing and looking around
Source: ZSL Thames Marine Mammal Survey, report 5681 — https://sites.zsl.org/inthethames/main/
30 Apr 2026 · London