Tidal Light was a Thoroughbred

Thoroughbred

The Thoroughbred is a horse breed best known for its use in horse racing. Although the word thoroughbred is sometimes used to refer to any breed of purebred horse, it technically refers only to the Thoroughbred breed...

 racehorse who was the champion filly of her year and beat the colts in the 1987 New Zealand Derby

New Zealand Derby

The New Zealand Derby is a set-weights Thoroughbred horserace for three-year-old, run over a distance of 2,400 metres at Ellerslie Racecourse in Auckland, New Zealand. It is held on the first Saturday in March, as the opening day of Auckland Cup Week. From 2009, it was run for a purse of $2.2...

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After finishing second in her debut, Tidal Light won ten of her next 13 races, including the Derby, Avondale Guineas, Waikato Guineas, Canterbury Guineas

Canterbury Guineas

The Canterbury Guineas was a thoroughbred horse race held over 1900 metres at set weights for 3 year old horses. The race was held in March each year as part of the Sydney Autumn Carnival at Canterbury Park Racecourse in Sydney, Australia.-Race History:...

 and a Group 1 victory in the Air New Zealand Stakes over older horses under weight-for-age conditions, beating the great Solveig.

She returned in the spring of 1987 as a four year-old, but failed to win a race and despite some good performances was obviously not the same horse she had been the previous season.

Her three year-old season earned her both the Three Year-Old of the Year award and Horse of the Year, a rare feat for a filly.

She died in March 2007.