Chris Squire is commonly known by his nickname "Fish", and the name is associated with many of his works (including his solo record, Fish Out of Water, and the solo piece "The Fish (Schindleria Praematurus)" from the 1972 Yes record Fragile). The name has multiple origins. First, his astrological sign is Pisces, and he is apparently a believer in astrology. Second, in the early days of Yes career, he once accidentally flooded a hotel room in Oslo, Norway while taking a shower, and Bill Bruford gave him the nickname. He may also have acquired this nickname because of the alleged amount of time he spends in the bath tub. On the 2007 documentary "The Classic Artists Series 3: Yes", Bruford says that the nickname arose because Squire spent long periods in the bathroom while they shared a house together in Fulham.
Chris Squire married Nikki in the 1970s. Nikki sang on the 1981 Christmas single "Run with the Fox" and also the track "Hold Out Your Hand" from Fish Out Of Water and later had her own band, Esquire, on whose first album Chris, Alan White and Trevor Horn assisted. Their family included Carmen Squire (Chris's stepdaughter), Chandrika and Camille Squire. Chris and Nikki divorced after fifteen years. Chris then married Melissa on May 8th, 1993, they have a son, Cameron Darian. The two have since divorced. He is now married to his third wife, Scotland who is expecting their first child. They reside in the Chelsea neighbourhood of London.