Category: Fish
These South American natives are a long-time favorite of fish-keepers and are named for the vibrant red coloration on their head. In the wild, they inhabit stretches of mineral-deficient (soft), acidic river that is rich in decaying plant matter. They are sensitive to changes in water conditions and are considered “canaries in the coal mine” for aquarium water quality.
https://en.wikipedia.org/wiki/Rummy-nose_tetra
http://www.petsource.org/aquatic-by-species/aquatic-fresh-water/3151-rummynose-tetra.html
The Oldest Fish in the Sea?
The Greenland Sleeper Shark, the only living species of sub-Arctic shark, is an apex predator only slightly smaller than the great white shark, with an estimated lifespan of 200 years - one of the longest-living vertebrates on the planet. While the Greenland Shark is a slow swimmer, it will eat just about anything: eels, flounders, other sharks, seals - and those are just animals who live in the water! Polar bear remains and even an entire reindeer body have been found inside these sharks! Fortunately, while there are Inuit legends of Greenland sharks attacking kayaks, there have been no reports of human predation. There have been, however many cases of people eating Greenland sharks! Their meat is highly toxic - it will produce effects in your body similar to being extremely drunk, but a fermented version that has been hung out to dry for several weeks is considered a delicacy in Iceland.
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