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24 January 2017 - Evénements

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Fish life in the aquariums

Strict rules of health, hygiene and nutrition are required for aquarium fish

Feeding the fish

The Museum’s fish are generally fed once a day, either early in the morning or at nightfall in order to approximate to the rhythms of their natural habitat. However, the aquarium team also ensures that the rhythm is not too regular and that the fish do not become accustomed to a fixed timetable.

The feed is made up of freeze-dried or frozen foodstuffs or granules, carefully regulated in quantity and quality, to ensure that each species, whether herbivorous or fish-eating, has a balanced diet.

Life expectancy

The life expectancy of fish in an aquarium is longer than in Lake Geneva.  The quality of the water, the stable environment, the optimum temperature, fewer predators and fishermen and a constant and balanced supply of food all contribute to longer lives. The fish in the aquariums will not be returned to the Lake. They mature and grow old in the aquariums. While average life expectancy is around 15 years for trout, for example, some of the Musée du Léman’s guests – an eel and a number of carp – have inhabited the tanks since the aquariums were opened in 1985!