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Farlowella sp.:
The Other Whiptailed Catfish

by Susan Rossi

Tankquilizer, February 2003
Tropical Fish Society of Rhode Island

 

The farlowella, unlike its cousins from the Sturisoma (Royal farlowella) or Rineloricaria (whiptail) genus is a very narrow bodied (pencil-like) fish. Although they possess the same elongated tail and extensions, they just don’t have the girth. They are sometimes referred to as stick catfish.

Farlowellas are neither very pretty nor exciting fish, but they are excellent algae eaters (true to their loricarid reputation), not particularly fussy, and very easy to get along with. My experience with these fish has been very positive (in other words, very easy).

I happened upon my fish in a pet store in July 1991. There were four 4” fish in the tank and I bought them all. They were housed for a few months in a 20 gallon high tank with a group of panda corys. The fish were then moved to a 15-gallon tank of their own. The tank contained a light layer of gravel, the traditional small piece of driftwood (just in case loricarids really do need it), and a corner box filter. The tank was unheated year round. Keeping the tank clean proved to be more work than I had planned on so it really never was. I hate to admit this in print, but you never know what might be relevant so here goes: The water actually smelled bad when I changed water and a carpet of white “mold” would grow on the gravel bed. Not only didn’t the fish mind, but they grew and thrived and spawned in this tank. Overfeeding at its finest!

Although I originally believed I had purchased 3 females and 1 male, as they grew, the fish were very easy to sex and it turned out I had 3 males and 1 female. The surest way to sex these fish is the males have bristles (almost furlike) along the sides of their short “snout” and the females' “snout” is longer, thinner, bare, and has a tiny round bulb at the tip. Because the fish is so skinny, a female with eggs is unmistakable. Lastly, in my case, the males outgrew the female by about 2 inches. She is only about 5 to 5.5 inches long.

Having three males in the tank proved to be no problem. They all got along. “Got along” is probably not quite the right expression for four fish who did absolutely nothing day in and day out. If it weren’t for the polluted tank, the growth of the fish, and the fact that they were occasionally in a different spot on the glass, I wouldn’t have know they were eating, breathing, moving, or even alive. OK, you get the point – boring fish.

Their diet consisted of basic flake and sinking pellets, as zucchini polluted the tank even more, and they weren’t interested in beef heart or worms. The average pH was 6.0 – 6.5 and the temperature was room temperature (probably as low as 68 in winter and as high as 80 in summer).

Early in May 1992, I found the female spawning on the back glass one night. At the time I wasn’t even sure which (if any) male was involved, because none was in the immediate vicinity. The next day there were about 50 – 55 eggs and one of the males was guarding them. By the second day I could see that the eggs were indeed fertile (at least none had fungussed). They began getting dark on the third day and although the number of eggs did dwindle slightly each day, I saw the first fry on day 10 and by day 13, they had all hatched and I had about 25 fry. After 3 or 4 days the yolk sac was used up and the fry were “grazing” on the slimy glass. I put an algae covered clay pot in the tank but the fry seemed to prefer to rummage around the bottom of the tank and scrape the glass sides. When the youngest (last to hatch) were about five days and everyone’s yolk sacs were gone, I began feeding spirulina powder every night, but I honestly believe they were feeding on the muck and infusoria. In either case, they were eating because they were growing.

The adults not only didn’t bother the fry, but proceeded to spawn again (one month after the first spawning) with the fry still in the tank. This time I witnessed some of the spawning. I couldn’t tell which male was involved because after she would lay a few eggs, he would come up next to her and nudge a little and fertilize the eggs but then go off again until she laid more eggs. This time the spawn was smaller, maybe 30 eggs, and after the same daily dwindling I ended up with only eight fry. One month later they spawned again. Again maybe 30 eggs, and this time no fry. The fish were moved first to a 55-gallon tank, which was overridden with algae, and then after about a month into two separate ten-gallon tanks (2 fish each). The “pair” did spawn again in a few months exactly as before. It was large spawn, which resulted in about 30 fry. Unfortunately, I lost most of this spawn about 3 weeks or so later. The adults appeared fine so I wasn’t (and am still not quite) sure what the problem was, but I suspect that they may have starved. The tank conditions were what we would consider much better than those described previously in the old tank. Regular water changes, sponge filter, and bare bottom, not to mention more conservative feedings were the rule. This didn’t allow for too much grazing by the fry. And although the adults never seemed to bother the fry, I doubt they were very generous with sharing their rations of pellets. The adults were then moved to a 29-gallon, clean, heated, community tank.

The fry from the original spawn are now about 7 months old and are about 3 inches long. The adults still do absolutely nothing. I don’t think that they are fond of the cleanliness, the heat, or the company in their new home, and they have not spawned since.

 

 

 

 

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