Length : Up to 11 metres.
Range : Widely distributed in cold to temperate waters.
Threats : marine litter, entanglement in fishing gear, pollution, boat strikes, hunting.
Diet : Plankton.
Weight : Up to 4500 kg. World's second largest fish.
Lifespan : Up to 50 years.
When we see them : Summer visitors - May to October
Basking sharks seasonal distribution is related to prey availability with higher numbers see around the islands of Coll, Tiree and mull. 2014 was poor year for sightings around Skye, whereas in 2013 there were a large number of reports.
For more information and to report sightings see www.whaledolphintrust.co.uk.