Creature will have swum over 40 miles up stream from the mouth of the Thames
There have been a number of sightings of what is believed to be dolphin on the Thames near Wandsworth earlier this week.
Amy Clayfield tweeted video footage of the dolphin on Sunday (29 October) by the district line bridge over the Thames from Putney to Fulham.
There was another sighting was just up from Hammersmith Bridge with video footage played on BBC London News.
The creature appears to be making its way up river as it has subsequently been spotted at Chiswick Pier and by the Chiswick RNLI at Kew Bridge.
An RSPCA spokesman said, 'The RSPCA has been made aware of a dolphin which has been spotted in the River Thames in the Putney area of London.
'We are liasing with British Divers Marine Life Rescue (BDMLR), who are monitoring the mammal, and are available to assist their teams if necessary.
'Anyone who is concerned for the welfare of an animal should contact the RSPCA's 24-hour emergency hotline on 0300 1234 999 for help or advice.
'Anyone with concerns regarding a specific marine animal can contact BDMLR directly on 01825 765546 or 07787 433412 (out of hours).'
Dolphin sightings on the Thames are not unusual but more rare this far up. River users often report seeing small dolphins or possibly porpoises following their boats.
November 1, 2017