That Fish Blog – Aquarium Advice and Information

Your reef tank may be immaculate except for a rusty-brown dusting of diatomic algae on your substrate. Tired of siphoning just to have the diatoms come right back? Relatively inexpensive and highly efficient, a sand-sifting sea cucumber may be the solution you’re seeking.

There are many species of sea cucumber available in the aquarium hobby. They get their name from their elongated, cylindrical body shape. Some are colorful, some are not, some are smooth, while others appear knobby or textured. Some are filter feeders that cling to the glass, waiting for food to come to them in the water flow. There are three specific types of sand sifters that are commonly offered which do a really great job cleaning up your sand. All of them belong to the genus Holothuria and they are very efficient at what they do.  Read More »

You walk into a trendy restaurant. You browse the daily specials…the featured fish of the day?  Lionfish.  This is one creative way to fight the exploding population of these fish invading Caribbean waters and rapidly expanding north along the Eastern coast. Read More »

Craig here with another blog about yet another species of piranha. We have looked at the Red Belly and the Black piranha, now it is time to take a look at one of the most aggressive and predatory of all piranha species – the Elongated Piranha.

While many species have a similar and classic look to them, this species is physically unique. Serrasalmus elongatus, also known as the Slender or Pike Piranha, is a sleek predator from the waters of Venezuela and Brazil. Like many other piranha species, it has a shiny silver body with fearsome teeth. It is a highly active and highly motivated predator of other fish from the region. While the coloration and eating habits are similar to other piranha, it is the elongated shape of this fish that separates it from its cousins. Read More »

Hello, Sam here with another small fish profile.  Fish from the group of known as the basslets are mostly small, solitary species that are great candidates for smaller tanks.  These fish are related to the much larger basses.  Two species of fish that I particularly enjoy from this group of fish are the Chalk basslet (Serranus tortugarum) and the Tobacco Basslet (Serranus tabacarius).  Both of these fish are found in the Caribbean and are normally imported around 3 inches in length. Read More »

Hello, Frank Indiviglio here.  If you stare long enough at a Lungfish or Mudskipper (as I have, often causing my co-workers to wonder…), it’s easy to picture a similar creature leaving an ancient sea and setting forth to explore the land in the distant past.  Indeed, evolutionary biologists tell us that a fish very much like today’s Australian Lungfish (Neoceratodus fosteri) did pull off such a feat some 360 million years ago, thereby setting the stage for the rise of the amphibians, reptiles, birds and mammals.  Read More »