I was sitting and enjoying my 75G aquarium this week, when I noticed a tiny little pleco sitting on one of my Cryptocoryne pontederiifolia leaves. Back when I converted my 54G aquarium to a native-themed aquarium, I moved all of the Ancistrus sp. ‘L279’ plecos from there into my 75G, where I already had a few. I had been hoping that they would breed for a couple years, but I guess the new mix of fish finally produced what I was after.

After spotting the one, I looked extra closely throughout the tank, and found at least 3 seperate individuals. They must have been in there for a little while because they’re all about the size of an Otocinclus right now, and actually look quite similar to one since their bristles haven’t yet started to grow on their faces. I hope all of these fry will grow up and start a little colony, as the L279 plecos are fairly hard to come by.

It’s really these little discoveries that make the aquarium hobby worthwhile for me. I spend so much time planted, trimming, feeding the fish, cleaning the tank, etc, that every once in awhile it is nice to find something come about that I wasn’t expecting.

In a 20L aquarium, I have a small colony of Threadfin Rainbowfish, Iriatherina werneri, that I’m attempting to breed. These blue-eyes are beautiful fish that I’m hoping to eventually have a huge school for my 75G aquarium. The males are especially brilliant, displaying long fins, which they use constantly to prove their dominance to other males, and to impress females.

The males also tend to get a striking headlamp, a bright yellow/orange stripe along the top of their head, when they’re courting females. The females are not pictures here, but they do not have the elongated fins that the males do. It’s quite easy to tell them apart due to the noticable difference in finage.

As you can see from the backgrounds in these pictures, I’ve been using spawning mops made from acrylic yarn to try and harvest eggs. The goal is to float these mops, have the fish lay eggs, and then remove the mop and place it into a hatching/rearing tank. By cycling two mops between these tank every 10-14 days, I hope to constantly have new fry. So far, I’ve been successful, but only on a very small scale.

The fry are absolutely tiny when they first hatch; no more than a millimeter or two long. Right now, I have a couple that are 5-6mm long, but recently lost some to a Hydra infestation. I feed the newly hatched fry GP 5micron powder, which besides green water is just about the only thing that will fit in their tiny mouths. I’ve started feeding the larger fry some baby brine shrimp. Hopefully, they’ll grow up fast, and will be able to go in with the adults soon. If anyone’s successfully bred and raised these fish, I’d love to hear some advise.

The Jewel Cichlids from Florida are at it again! Last week, I had a cloud of fry, with a dozen or two remaining today, but nevertheless the parents are protecting them. The fry spend much of there time combing through algae on the manzanita wood in the tank. If they ever venture too far away, the parents suck them in their mouth, and bring them back “home.”

And of course, the bonded pair are acting like psycho parents toward the other two Jewels in this tank. Fortunately, all of the cichlids have plenty of hiding spots, and are roughly equal size, so no one has gotten injured. That hasn’t stopped the parents from lording over 2/3’s of the tank, however.

Despite being beautiful fish, I don’t really want anymore, so I’m not deterring much from my usual feeding routine with this batch of fry. I’ve added an occasional feeding of hatched brine shrimp and egg solution, but mostly I’m letting them fend for themselves. If a handful grow up, that’s great, but if not, I’m sure they’ll have more babies soon enough.

Over the past few days, I have noticed that my two females in the 40G have been bright yellow in coloration, and have remained very close to their caves. These are tell-tale signs that they’ve been spawning. It looks like the first female’s fry are now free swimming!

Right now, there is a sizable group of fry, with at least 20-30, but it could be even more. They move around so much, and they all look the same, that it’s near impossible to count. They spend most of the day grazing on tiny organisms and detritus throughout the tank, and especially on the porous mossy rock that contains all kinds of nooks and crannies for them to sort through.

Some of them even seem to take refuge in the small holes formed in the volcanic rock. I don’t plan on trying to remove the fry from the tank, so essentially it’s up to their parents and the cover of these rocks and plants to grow them up. I will, however, prepare a batch of baby brine shrimp for them this week to help them grow up big and strong.

I noticed today that my adult jewel cichlids, collected in Florida, were acting more territorial than usual to their last set of offspring in the tank. Those young are now all 1-2 inches in length, and doing quite well. The adults, however, seem to have moved on, and are guarding a new patch of eggs.

They’ve taken a new spot this time, occupying the left side of my 20G high tank, underneath a manzanita branch. There are eggs scattered on the underside of the manzanita branch, but mostly on the surface of the rock directly beneath that.

The parents take frequent turns guarding and fanning the eggs. I probably spent a collective hour watching them today, and their rotation is really only about 1-2 minutes before the one roaming the tank comes back to the nest, switching places with the other one. That said, the female does seem to spend more time guarding the nest while the male patrols, but not by too much.

I suppose this means that I ought to move the previous fry from this tank into their own dedicated one before the eggs hatch. If there are new free-swimming fry, I fear that the last batch will be eliminated by the parents.