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Maintaining good water quality is a foregone conclusion in fishkeeping, but it cannot be stressed long and hard enough when it comes to keeping corals. Perhaps it is not surprising then that some enthusiasts adopt almost clinical levels of cleanliness…

Veterinarian Bob George sliced open the dead shark and saw the outline of a fish. No surprise there, since sharks digest their food slowly. Then George realized he wasn’t looking at the stomach of the blacktip reef shark, but at…

Some coral reef fish starve themselves to avoid getting into fights with their larger, dominant neighbors, researchers have found. Emerald coral gobies live in small groups in which social rank is strictly determined by body size. Within each group only…

This species comes from the Red Sea and Indian Ocean; along with its close relative Zebrasoma veliferum from the Pacific, it is the largest Zebrasoma tang, potentially growing to 40 cm/16″. If you want to keep one you need a…

Always buy the biggest set-up you can afford. The term set-up, and not tank is mentioned because a large tank will need a large filter, large heater and adequate lighting, so make sure that you can afford not only the…

A baby giant manta ray — claimed to be the first in the world to be born in captivity — died at a Japanese aquarium Thursday after being abused by its father, its Japanese keepers said. The female baby manta…

Also known as the sea wasp, this salad-bowl sized jellyfish can have up to 60 tentacles each 15 feet long. Each tentacle has 5,000 stinging cells and enough toxin to kill 60 humans. These generally aren’t exported for aquarium trade.…