UV sterilizers are great for treating green water ( micro-algae) in ponds and tanks or if you have a tilapia farm or super high density display tank with bacterial nutrient blooms. In your reef aquarium or quarantine tank they may do more harm than good. Ultraviolet sterilizers kill small organisms. Do you want to kill bacteria and algae, worm eggs and sponge cells; basically floating vitamin packets delivered live to the mouths of filter and muco-ciliary feeding animals such as corals, sponges...
Sometimes, white spots on a fish  isn't marine ich (cryptocaryon) and so don't jump to that conclusion or you may end up treating the wrong way and stressing your fish and yourself out. The Paracanthus tang is the poster child for an opportunistic external bacterial infection (vibrio sp.) which I have diagnosed a few times with a microscope and staining. I have had numerous cases of large tangs with white flecks or little jelly pinpoints which looks almost exactly like the classical...
Many advanced hobbiests and veterinarians have been asking me to put up some video's I've been compiling to tell the differences between the common ciliated protozoans we see attacking our fish. Aquarium fish can suffer from a variety of parasitic protozoans but sometimes it's tough to tell these "bugs" from bacteria "grossly" by just looking at the fish. It's also often important to know which "bug" we are dealing with. Using a microscope slide to scrape the side of a fish (if you can catch it...
Unnatural range changes, catching potentially (though not officially) critically endangered species, and the attitude of fishing and entitlement to catch in general should raise alarms to those conscious of the dramatic balance shifts in aquatic ecosystems. Our fishing laws reflect research which lags behind reality. As fisheries fail and we then implement restrictions, fishermen have to invest more effort into fighting imminent unemployment than if they had coordinated with each other and...
Unfortunately most animals in the ocean which are of economic value to humans are over fished. This is not the case with marine ornamental fish. The reproduction strategy employed by reef fish is to produce hundreds of thousands of eggs and the ultimate survival to adulthood is more dependent on reef density and predation than collection pressures from humans. There are certainly cases where specific species in specific places have been over fished, bangaii cardinalfish are a prime example and ...
The general rule when buying a lionfish is that it will try to eat any fish or moving invertebrate which fits into it's mouth. Of course as a lionfish grows it's mouth gets bigger and so tank-mates are limited to rather large fish. There are exceptional lionfish, individuals can grow up with smaller fish, actually an appropriate analogy might be the lion-king with Timone and Pumba, and consider them "friends not food". Realize that at any moment these lionfish have the potential to become...
The article posted by the Huffington Post, hit me pretty hard. It's about beach-goers fighting over the right to take a picture with a small shark all the while the shark was suffocating.  This could only happen in todays society. Of course it's because we never had such mobile technology and means of sharing as we do now with social media but this only brings to light the ignorance and apathy towards fish/shark welfare that has always been there. Clearly this was not a case of inherent fear of...