This Is the Sea, released in September 1985, is the third The Waterboys album, and the last of their "Big Music" albums. Considered by critics to be the finest album of their early rock-oriented sound, described as "epic" and "a defining moment", it was the first Waterboys album to enter the United Kingdom charts, peaking at number 37. Steve Wickham makes his Waterboys recording debut playing violin on 'The Pan Within' and subsequently joined the band, appearing on the video of "The Whole of the Moon". This Is the Sea is the last album with contributions from Karl Wallinger, who left the group to form his own band, World Party.