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What are they[edit | edit source]
They are added in aquarium food to provide essential minerals to aquatic animals which aids the animal in keeping its skin colour and general well being.It is also believed to boost their immune system.
Carotenoids are not produced by the animal but have to be consumed regularly in order to build up in the skin cells of the animal and thereby giving fish and other animals (like amphibians) their distinctive colours.
Types of Carotenoid[edit | edit source]
Astaxanthin[edit | edit source]
This is produced by the micro algae Haematococcus pluvialis. This food is a powerful anti-oxidant. One comprehensive study found astaxanthin to be 10 times as effective as beta-carotene (and approx 100 times more effective than vitamin E) (Di Mascio et al-1991).
Canthaxanthin[edit | edit source]
Phaffia Yeast[edit | edit source]
Usually supplied as a powder. This yeast contains a number of carotenoids.
- It can take up to 45 days for a fish to recover its full colour.
Carotene[edit | edit source]
Carotenes include: α-Carotene, β-Carotene, γ-Carotene, δ-Carotene, Lycopene, Neurosporene, Phytofluene, Phytoene.
Links[edit | edit source]
Commercial fish foods with added Carotenoids[edit | edit source]
- Tetra Colour Crisps
- Tetra Ruby Flake
- Interpet Tropical Fish Flakes
- Hikari Algae Wafers
- Hikari Flake Tropical
- Hikari Goldfish Gold
- Hikari Oranda Gold