Tetra

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Tetra

A fish food manufacturing company. It was established in the 1950s to market recently invented fish food flakes. Tetra's product made fish keeping much easier, resulting in a dramatic increase in participants in the hobby.
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The characins living in Trinidad show considerable variation in the shape of male sex ornaments, and the researchers suspected that those differences might have something to do with what they eat.
Kolm's team has now confirmed that characins that mainly eat ants also carry sex ornaments that look more like ants.
Species of large fish such as jaw characins (Salminus brasiliensis), spotted surubim (Pseudoplatystoma corruscans), barred surubim (Pseudoplatystoma fasciatum), streaked prochilod (Prochilodus lineatus), "piraputanga" (Brycon hilarii) and threespot leporinus (Leporinus friderici) are some of the most remarkable Pantanal ichthyofauna (Menezes, 1994).
Its fish fauna is mostly composed of traira (Hoplias malabaricus), curimbata (Prochilodus lineatus), tabarana (Salminus hilarii), armoured fish and characins.