That Fish Blog – Aquarium Advice and Information

The genus Cirrhitichthys is the largest group of hawkfish represented by 8 different species. The name Cirrhitichthys comes from the Latin “cirrhi”, or “cirri”, meaning filament or fringe, and “ichthys” which simply means fish. As their name suggests, the fish in this genus are distinguished from other hawkfish by the filamentous tufts on the end of their dorsal spines.

Cirrhitichthys, like all other hawkfish, are protogynous hermaphrodites. That means all hawkfish are born as females, but rely on environmental triggers to incite one female to become a dominant male. They are typically found perching high up on corals, watching below for small crabs and shrimp which they swoop in to eat, much like a predatory hawk. The fish prop themselves up with their large, skinless pectoral fins. Because these fins are skinless, they do not feel the sting of the corals they perch upon, so a coral colony can offer protection to these smaller fish.  Hawkfish are generally quite active during the day, hopping from one perch to another in search of food. They are generally hardy and disease free. They should be offered meaty foods such as mysis shrimp and squid, but their greedy nature will lead them to snatch up pellets, flakes and pretty much anything else you offer. Just like any fish, variation in their diet and vitamin supplements will help to maintain health and coloration. Read More »

It isn’t hard to understand the appeal of Synodontis Catfish. I mean, what’s not to like? Besides the array of bold and attractive patterns they exhibit, they have interesting history and habits that drive many freshwater aquarists crazy. If you’re not familiar with this group of fish already, read on to find out why they’re one of the most popular in the aquarium trade.

Synodontis Cats originate from the continent of Africa from the sub-Saharan rivers and rift lakes. There are over 120 identified species, ranging in size from just a couple of inches to over a foot in length. They are robust in build with prevalent dorsal and pectoral fins as well as large adipose fins (between the dorsal and the tail). Large eyes and 3 sets of barbels (whiskers) are also distinguishing characteristics. Synodontis catfish are also scaleless.  Read More »

The other day I was doing one of my daily walk-throughs and looking for a particular fish, but simply couldn’t find it. Mind you, this was not some tiny little goby or tetra that could almost literally disappear, this was a rather large, Spotted Royal Pleco, Panaque cf. nigrolineatus (L330). This particular Royal Pleco is something around 8 inches long. How in the world do you lose an 8 inch pleco? Check out the pic to the right and you’ll see. Read More »

This time around I want to talk about something I hold dear to my heart…aggressive cichlids. Most cichlids have a mean streak towards other fish in the tank, but its a whole different story when that aggression is turned on an unsuspecting aquarist.

Most of the species that exhibit this type of behavior tend to be in the South and Central American cichlid group. The African Rift Lake cichlids normally keep the aggression focused on other fish in the tank, though I’ve had some shell-dwellers who would attack my arms and on occasion rip out some arm hair…truly they can be like feisty little bulldogs. Some larger West Africans and cichlids from Madagascar have also shown brazen territoriality towards me in my many years of keeping them. Read More »

Routine water changes are the most basic, most necessary, and most overlooked acts of tank maintenance. Most aquarists know they should do water changes, but not everyone does or even knows how to do it the right way. How much and how often are highly debated topics among aquarists no matter what kind of tanks they keep.

Why should we do water changes?

Removing water from the aquarium and replacing it with new, “clean” water removes waste and organics that are dissolved in the water. It also helps to remove any chemical treatments or medications when the treatment is complete. Dissolved organics contribute to Nitrate and Phosphate build-up that aquarists try so hard to control. These compounds can affect the health of your livestock directly and can promote algae and cyanobacteria growth, making your tank unsightly. Changing the water also helps to replenish minerals and other trace elements. This can be especially important in tanks with corals and crustaceans (crabs and shrimp, both freshwater and saltwater) that use these minerals to form their skeleton or exoskeleton. Corals and other saltwater invertebrates can use up minerals fairly quickly in a closed environment, and replacing old, depleted water with fresh saltwater adds these minerals back into the tank. Read More »