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The Mexican tetra is easy to raise in the laboratory and exhibits many of the attributes that have made zebrafish a popular model system in developmental biology.
It was a black skirt tetra , which is a fairly common aquarium fish.
The tetra is particularly popular with hobbyists, since it is attractive in appearance, undemanding in maintenance, and easily bred.
Cardinal tetra is the bright glowing variety and marble molly looks like dotted marble and comes both in white and black.
Like many tetras, the glowlight tetra is a schooling fish and prefers to swim in the company of at least seven of its peers.
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