Common Dolphins (Delphinus delphis) can often be seen in groups, travelling at speed around the coastline off the Trevose Headland. They come close to the shore to feed. The best way to spot a Dolphin is to keep an eye out for the dorsal fin which is tall, triangular and curves slightly backwards. A Common Dolphin can also be identified by its colour, dark grey above and whiter below. They can easily be mistaken for the Bottlenosed Dolphin, but you can tell the difference as the Common Dolphin can be distinguished by the hourglass pattern on its flank.