You are right Doug.....Tilapia

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Tilapia

Who farms it? Though native to Africa, this freshwater fish is

cultivated in China (54 per cent of the market), Thailand, Asia, South

America, the Pacific, North America and the Caribbean. Production totals

more than 1m tonnes.

How? The male is preferred because it grows to market weight quicker

than the female. Incubated males are sexed by hand, using dyes to

highlight their genitalia, or fry are fed a sex-reversal hormone to

produce an all-male population. Females are sold for fishmeal. Tilapia,

which are herbivores, are reared in unmanaged ponds, in net enclosures

on lakes, in crowded cages or tanks. Some eat plants, or are given

protein-rich feed.

What's in it? The dyes malachite green (banned in Europe), halcyon blue

and ink are used for sexing. Tilapia are what they eat, and in unmanaged

systems, animal manure and even human faeces contribute to the mix.

Pond-reared fish can have a muddy taint caused by geosmin. Ponds and

lakes are often laced with pesticides.

Are the fish harmed? Even in natural ponds, tilapia are overstocked.

Stocking densities are as high as 150kg/m3 in high-tech oxygenated tank

systems.