Much depends on the type of voyage you choose. Longer trips, or trips that take you further out to sea will obviously increase your chances of encountering the more unusual species that sometimes visit, but many species can be observed in coastal waters.
Many people are surprised at the wide variety of “mega” marine wildlife that inhabits our coastal seas, but the waters around Britain have always been rich in marine life. Some species are obviously more common than others.
Click on a thumbnail below to reveal a bigger picture.