A historic pier and aquarium on Manhattan Beach, California, is undergoing a major renovation after reaching its fundraising target.

The Roundhouse Aquarium, which was built on the end of the 100-year-old iron pier, will benefit from a complete refurbishment, with the US$4m (£3m, €3.4m) project being led by Cambridge Seven Associates.

Michael Greenberg, CEO of the global shoe company Skechers, led the appeal for funds, raising over US$1.5m (£1.12m, €950,000) through a foundation set up in memory of his late son, Harrison. The local community raised a further US$1.75m (£1.31m, €1.49m).

The exterior of the roundhouse will not be changed beyond a fresh coat of paint and new doors, windows and roof, but inside the aquarium will be completely updated and modernised, with new tanks, displays, learning stations and multimedia interactives.

About 250,000 people visit the small attraction every year, which survives on donations to maintain the structure and care for the animals.

The renovation works could be completed by May 2018.