The Atlantic killifish, Fundulus heteroclitus (AKA Mummichog) is a North American fish that not only can survive highly variable salinity, temperature fluctuations from 6 to 35 °C (43 to 95 °F), and nearly anoxic (oxygen-less) water, but can withstand toxic levels 8,000 times more lethal than other fish can survive.
Guppies can't count exact numbers like people and a few animals (e.g. African grey parrots) can. But they do possess the ability to discern "more" vs "less," and some guppies are better at this skill than others.
Meet Lipogramma haberi and Lipogramma levinsoni, the two newest basslets found on extremely deep Curaçao reefs in the Caribbean.
Sometimes unkempt equals beautiful. Precise aquascaping styles like Iwagumi, Nature, and Dutch are clearly impressive, but sometimes simply letting your plants run wild can also turn into striking aquariums.
A study has found the oldest genotypes of Acropora palmata (elkhorn corals) are over 5,000 years old. Put another way: reefkeepers can still be trading the same frag genes of today's "designer corals" many millennia from now.
We've all made mistakes with the care of our fish, but this fishkeeper may take the prize for the most successive number of tragic errors. And she recorded the entire ordeal.
No; not that kind of sponge filter. I want to talk about living sponges. These sedentary animals may look passive, but they are anything but. Their active water pumping mechanism is really impressive.
Lubricogobius tunicatus is a new Indo-Pacific dwarf goby (mature size of about 0.4"/1cm) that lives inside the oral or incurrent siphons of tunicates – just another fascinating symbiosis found on reefs.
Advanced Aquarist welcomes our newest contributor, Alex Wilson. Alex describes how to quarantine marine-fish by combining hyposalinity and the "Transfer Method II" to prevent the two most common and virulent fish diseases: Ich and flukes.
About three quarters of coral species broadcast spawn (eggs and sperm) into the water for external fertilization. Fewer corals fertilize internally, brooding "baby corals" (scientists call these planulae) before "giving birth." Mediterranean sun corals are one such coral, and their way of giving birth is even more rare and weird.
Some of us think that reef fish can't see the color red because red light is quickly filtered out by seawater. But then why are so many reef fish fluorescence red? Studies are showing that reef fish not only see red, but the color serves very different purposes for different fish.
Dr. Tim Wijgerde has been perfecting his time-lapse photography. His latest 4K video reveals the slow motion of lovely Acropora polyps. Old timers will remember the days when Acropora were considered impossible to keep in captivity. Oh, how times have changed.
Amblygobius calvatus and Amblygobius cheraphilus are the two newest species of burrowing gobies from the tropical western Pacific Ocean. They exist in shallow water but are skittish and have evaded discovery until now.
I can't think of a more wonderful way to divide two rooms; both the kitchen and the dining table share view of this incredible reef aquarium.
The winning bid on a Facebook auction for a betta fish pigmented like Thailand's national flag ended at a whooping 53,500 baht (~$1,500 USD)! As far as we are aware, this makes it the most expensive betta fish in the world.