sailfin tetras ( Crenuchus spilurus ) are growing and thriving...

[Magnum Man]

just a follow up, as I haven't mentioned them in a while... I started with 6 or so, of them, and by the time everything shook out, I now have 4 thriving in my South American Tetra tank... the biggest one is now close to 4 inches long... a little longer than the mature palmeri's, but not quite as heavy... I suspect none are mature yet, but they seem to be taking to the environment I set up for them...

 

[Magnum Man]

Seriously Fish says "Generally 50 – 55 mm, although some forms can attain 70 mm"

and...

"This species is currently the only described member of its genus although colour pattern and morphology vary considerably across its range."

sounds like this one is in need of more study, as large as mine are, and not appearing mature yet... I suspect they'll be dividing these guys up, in the future???

they like the shadows, so it's hard to get a good picture...

 

[Mr Limpet]

My sailfins were fully sexable when they were 2 inches long; the male eventually reached 3 inches. A 4 inch Crenuchus spilurus is a monster!

 

[Back in the fold]

Wow ! So they do get big . They must be cool to see in person .

 

[Magnum Man]

these are back in stock, from the seller I bought mine from...

Sailfin Tetra (Crenuchus spilurus)

A beautiful tetra originating in the acidic blackwaters of the Amazon and Orinoco basins, the Sailfin Tetra is a medium-sized species that makes for an impressive display fish as an adult. Both sexes have the namesake large dorsal fin, but mature males will have an extremely elongated, brightly...

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