Sharks hold a fascination for everyone, whether they inspire fear or admiration.  They are iconic creatures many of us automatically associate with oceans, reefs, beaches and aquariums.  Though I have to say I am not a supporter of most sharks being placed in home aquariums, the possibility and temptation presents itself too often to be [...]

Please welcome Sam Yost as a blogger on That Fish Blog.  Sam has recently been promoted to Fish Room Supervisor and will be graduating from Millersville University in December with a degree in Marine Biology. 
Hello, My name is Sam Yost.  Being a hobbyist and working with other hobbyists in the trade, I have grown to understand [...]

Hey Fish Blog Followers! There are lots of different types of freshwater communities created by hobbyists. Some people choose a peaceful community of tetras and other small docile fish, while others opt for a tank populated with predators or other territorial species, often a fine balance between tolerance and aggression. Many aquariums are somewhere in [...]

Hello, Frank Indiviglio here. Damselfishes and Clownfishes are closely related, with all 325+ species being classified in the Family Pomacentridae. Among the most numerous and conspicuous fish on tropical coral reefs, a number make hardy marine aquarium inhabitants.
Range and Habitat
Damselfishes and Clownfishes are found throughout the world’s tropical and semitropical seas, with the greatest diversity [...]

Hello, Frank Indiviglio here. Fishes outnumber all other vertebrates combined, with nearly 30,000 species identified so far.  No doubt, the ability to learn has assisted in this success.  In Part I of this article, I recounted my experiences with “educated” electric eels in Venezuela, and gave some other examples of fish intelligence.  I’ll continue here, [...]

Hello, Frank Indiviglio here. The natural behavior of fishes is so interesting that one can easily overlook the fact that they are capable learning in the true sense of the word (i.e. changing behavior in response to experience). Fishes are, after all, the most successful vertebrates in terms of species diversity (nearly 30,000 species have [...]

Eileen here. We’ve all heard some of the general “rules of thumb” for stocking an aquarium: an inch of fish per gallon, one fish per gallon, more fish = less aggression and countless others. So, what works best? There are several approaches that can help make stocking an aquarium easier.
Research, research, research!!
It’s no secret that [...]

Eileen here. Some myths and legends are universal. Almost every country has some version of a “bigfoot” legend. Nessie is one of Scotland’s biggest celebrities. People are abducted by aliens and UFO’s are spotted in the sky around the world. What does the aquarium hobby contribute to this list?
 
“Fish only grow to the size of [...]

Especially for beginners, getting what you need for setting up a saltwater or reef aquarium can be daunting.  One of the most confusing aspects of the process may be Live Rock.  Here are some common Q & A that may make it a little clearer for anyone, especially those who just starting out.
Do I [...]

Hello, Frank Indiviglio here. Please see Part I of this article for information on using plants and bacteria to control algae. Today I’d like to take a look at some algae-eating fishes, snails and shrimps.
Sucker Catfishes (Plecostomus, Hypostomus, Loricarichthys spp.)
An incredible array of fishes consume algae, with these interesting beauties being among [...]