That Fish Blog That Fish Blog is the source for aquarium advice, information and interaction with the experts at That Fish Place

Hello, Frank Indiviglio here.  The world’s 30-35 freshwater sunfish species (Family Centrarchidae) range throughout Canada, the USA and Central America.  Although popular among European aquarists, sunfishes have been largely been neglected in American aquaculture. This is a shame, as all are colorful, interesting and active, and most adjust well to aquarium life. From the tiny Black-Banded Sunfish to the 39 inch long Largemouth Bass, there is something for everyone.  I’ve had the good fortune of working with a “sunnies” ranging from the tiny Black-Banded Sunfish to the massive Largemouth Bass, and would enjoy hearing from readers who have also come to know them, or wish to (please post below).

Obtaining Sunfishes

Although rarely offered in the pet trade, many species are easily collected via seine net or minnow trap (check state regulations).  While their diversity is greatest in the southeastern USA (my friend in Louisiana collected 8 species in the lake behind his house!), sunfishes can be found most everywhere in the USA. New York, where I reside, is home to 14 species. Read More »

Well, hello! It has been awhile since I’ve blogged, but some current acquisitions have inspired a new post. Recently, one of our fish distributors informed me he had some Hericthys bartoni available. So for our anniversary sale I ordered 20 of them to offer for sale. A couple days later I was staring 20 fish each between 1 inch to 1.5 inches in length. We acclimated them into a 40 breeder and waited until the sale weekend to offer them, once we knew they were eating well in the store. The weekend came and went quickly, but I’ve knew this was a species I had to grab for myself. I’ve always wanted to breed them, from first time I saw a picture of one, and we carried them a long time ago and were able to get them to breed at around 3 inches. So I netted 7 of the remaining stock and placed them in holding, til I make some room for them.

Let’s talk a little about this gem from Mexico. Bartoni is restricted to the springs of Rio Verde. Water conditions may vary from place to place with pH ranging from 7.6 – 8.0 with a stable hardness (100 degrees German and a carbonate of 15 degrees). A robust male Bartoni can reach lengths up to 8 inches, while females reach a little over 4 inches. Males also develop a nice little forehead hump.

Their normal coloration is gray to light brown with a row of black blotches running from behind the eye to the base of the caudal fin. Some scales in the lower half of the body have a blue spot. But the breeding coloration is outstanding, and it’s also one of the main reasons I want to keep this fish. In both sexes, the upper half of the body turns white while the lower half becomes velvety black, including the fins.

In the wild, Bartoni mainly dine on algae, but so far they have done well on frozen cyclops and flakes while in holding. I would make sure that they get a flake high in veggie matter.

Pairs tend to either spawn in caves or beside rocks. The size of the clutch dependes on how old the female is, with an adult producing as many as a couple hundred eggs each spawn. At 84 F the eggs hatch in about two and a half days. In another five days, the fry should start to become free swimming after they consume their egg sacs. The females does most of the brood tending inside the cave while the male guards the perimeter. At any sign of danger, instead of running away like most Central American cichlids he will enter the spawning cave and wait with his mate until the danger goes away. Both parents take care of the fry when it comes to feeding time.

Bartoni generally tend to be very aggressive towards conspecifics, and sometimes their aggression may extend to other species in aquariums smaller than a 50 gallons. 

It is believed in many circles that this species and others may become endangered in the near future, due to the introduction of a tilapia to their native waterways. What a shame that would be! If you have room for a 30 or a 40 gallon aquarium, this would be an awesome fish to add to your collection, and you can do your part to conserve them through captive breeding. 

Until next time,    

Jose

Maintaining proper aquarium temperatures is essential for the health and well-being of your fish. While aquarium heaters do a pretty good job at this, the probability of fluctuations from fall through spring tends to be greater and possibly more detrimental. You may not even realize how much the temperature of the water changes through the day or day-to-day until you’re faced with ich or some other problem in your aquarium. 

The Threat of Cool Temperatures

Remember the cold snap in Florida last winter?  While our aquarium fish will rarely if ever be exposed to near or below freezing temperatures in the safety of your home (hopefully), fish farmers in Florida can attest to the immediate and lingering problems that can come with even short exposure to cold temps. Exposure to temps below 60 F can create chaos in a tropical tank, so you can imagine what freezing temps do to tropical fish housed in an outdoor setting. Sensitive fish may be killed outright from the shock of extreme temperatures or fluctuations in temperatures. Others face blows to their immune systems and the increased chance of being infected by opportunistic parasites, fungi or bacteria. These organisms take advantage at the slightest sign of stress on the part of tropical fish, and can decimate the population in a short amount of time. Cooler temperatures tend to make normally active fish lethargic and slower to react, making them more open to predation if outdoors. Similar problems can occur in the aquarium if smaller or more sensitive fish are not able to hide or escape the curiosity of larger, hardier tankmates.  Read More »

We all know how colorful African Cichlids are, but did you know that there are also other fish in the rift lakes like catfish, crabs, eels? We are going to talk about some cats this time around. I have kept plecos with most of my African Cichlids and most other people do too, but fish like the “Cuckoo Cat” and the Petricola are more adapted to these kinds of tanks. Although they won’t eat algae, they will feast on flakes, pellets or any other frozen food that you may feed your cichlids. Below I’ve listed just a few of the species that are found in the rift lakes, and some may not be found in pet shops.

Lake Tanganyika

Claroteidae – there are at least 62 species in this family, but we will talk about a few that have been bred in the aquarium and may also be found in pet shops. Read More »

Hi, Jose here. When I was younger, I was looking for something that would light up the bottom of my 30 gallon South American tank. I did a little research and found a picture of a curviceps…I got really excited because from what I found they were pretty little fish. I purchased a trio of Dwarf Acara at a local pet shop labeled “sky blue curviceps”.  I didn’t know much about them, and I hadn’t really heard about them from other enthusiasts, but then again I wasn’t into cichlids at that time, so it was something new.

After they became adjusted to the tank, I ran peat through my Fluval 402 filter and hoped for some eggs. After a couple of nerve wrecking months, I noticed that a pair had formed and the third fish was killed by the pair. I placed some smooth, flat 5 to 6 inch rocks hoping the new couple would spawn on one. I figured that their tankmates (neon tetras) wouldn’t mess with the eggs, so I didn’t have to worry about anything eating them. But in watching the pair, I noticed something that worried me a little. I thought the male would be a light blue dwarf, but this fish was developed red color from the lower tip of the mouth to the rear of the body and red ventral fins. The “female” was also brightly colored, so I started wondering if I had two males. The person at the pet shop told me the female should be dull-looking because only males have color, a common trait amongst many cichlid species.  Read More »