-
Posts
8,253 -
Joined
-
Last visited
-
Days Won
31
Content Type
Profiles
Forums
Gallery
Everything posted by Harlequinmania
-
A must have fish for all fish only tank. The "belize" queen Sent from my GT-I9300 using Tapatalk 2
-
Click through to see the images. Dan Goods describes his project: My friend David Delgado and I put this together for a friends birthday party. She is an Aquarius and totally into that sort of thing, so for her 65th birthday we wanted to do something about water. These windows look out into her back yard. We hung a sheet on the outside (using binder clips to attach it to the gutter), then placed a 6000 lumen projector with a super wide angle lens in the back yard rear projecting onto the screen. It turned out to be super believable! The window frames really made it feel like you are looking into another world. The amazing underwater footage came from Rafa Herrero Massieu... check out his work: vimeo.com/8932532 View the full article
-
Drop in coil condenser vs chiller
Harlequinmania replied to enseng's topic in New to the Marine Aquaria Hobby
As far as i know only single unit compressor can be used for aquarium chiller. Mulit split system unit cannot be use together for both aquarium and room air-conditioning for the reason that it need to hook on to the temperature sensor to kick start the chiller. -
Click through to see the images. Last June I covered the OpenROV project - an open source underwater remotely operated vehicle that can be built by anyone for under $1000. The OpenROV opens up underwater exploration for many people that did not have access to this kind of technology before. NASA has even evaluated OpenROV at Aquarius and found it a capable little vehicle. Now people that have built OpenROVs of their own are contemplating a new use for them: controlling the invasive lionfish. How might you ask? By installing spearguns to the chasis, of course. It would be cooler to see friggin lasers, but a speargun is still cool too. A number of design concepts are being put forward by the community and some are indeed looking promising, with the ability to be reloaded without having to come back to the surface. Unfortunately it will take a lot of OpenROV operators to make a dent in the lionfish population, but every speared lionfish counts! View the full article
-
Strait time news on Saturday 08.06 reported a men was caught trying to smuggle corals into Singapore and get caught and jailed. So it is not worth the risk trying to bring back corals for your own aquarium tank even during your diving / snoking trip in neighborhood water like tioman ect as local AVA is stamping down hard on this.
-
Advice needed on Marine Fish's resilience
Harlequinmania replied to woyeng**'s topic in New to the Marine Aquaria Hobby
My experience tell me that marine fish can go without food from between 3 - 21 days depending on the size and types of fish. i.e for larger fish, they can last longer without food whereas for small nano fish anything more than 3 day would have starve them to death. -
If your clown trigger is smaller in size than your angel fish in your tank it should be ok. Sent from my GT-I9300 using Tapatalk 2
-
Hi David, You can only upload photos from you phone unless you are using tapatalk or forum runner installed on your phone.
-
Click through to see the images. A preference for one side is called lateralization. Many human behaviors, such as being left-or right-handed when writing, are lateralized due to the body's asymmetries and different wiring in the brain's hemispheres. "In addition to humans, many animals show lateralization, including the bridled monocle bream we used in this study," said lead author of the paper, Mr Dominique Roche, a PhD candidate in the ANU Research School of Biology. "There has been some evidence that lateralization is plastic, meaning it can change depending on the circumstances. For example, history has shown that some people born left-handed can become very adept at writing with their right hand if forced to do so in school. In fact, they often become more comfortable using their right hand in the long run." The bridled monocle bream is often parasitized by a large crustacean which attaches itself to one side of the fish's head, just above the eye. "We were interested in testing whether the ecological interaction of having this parasite attached to the fish's head had any influence on lateralization and whether it was changeable," said Ms Sandra Binning, who collaborated with Mr Roche on the study. The team caught bream with and without parasites from Lizard Island on the Great Barrier Reef and swam the fish in a maze that resembles a T-intersection, which forced the fish to choose to turn left or right. "The population as a whole didn't show a preference to turn one way or the other," said Mr Roche. "However, at an individual level, some fish showed a turning preference, with parasitized fish showing a much stronger preference than their unparasitized counterparts. If they have a parasite, they definitely choose a side." When the parasite was removed, turning preference became much less pronounced, returning to the level of the unparasitized population. "This is one of the first instances where lateralisation has been shown to be plastic and change so rapidly," said Mr Roche. "Having a preferred side gives the fish an advantage. Lateralized fish are quicker at responding to threats. We've shown previously that parasitized fish swim slower than unparasitized fish. Given that our parasitized fish don't swim very fast, it makes sense that they need to react faster to predators to give themselves a head start and have a better chance of escaping." Interestingly, not all fish react the same to their parasite – some showed a preference to turn towards and some preferred to turn away. "This is a good thing – the parasites are quite big and a predator could spot them easily," said Ms Binning. "If all parasitized fish always turned towards their parasite, eventually predators would be able to anticipate their reaction, and parasitized fish would lose the advantage of reacting quickly." "This is a really exciting and interesting result," said Mr Roche. "Fish are vertebrates like us, and determining whether important behaviors like turning can change ultimately helps us better understand humans and whether our own preference for using the right or left side of our body is plastic depending on circumstances and the environment around us." The research is published in the journal Behavioural Ecology and Sociobiology. (via Press Release) View the full article
-
Click through to see the images. Download your free copy today. This issue features the following articles: A detailed livebearers guide covering mollies, platys, swordtails and guppies. The convict cichlid is profiled, including details on a different way to keep the species. Five old favourites – kissing gouramis, angelfish, silver sharks, tetras and the kuhli loach are reviewed. Damsels, mainstays of the marine hobby in the days before protein skimmers and LED lighting, are covered. View the full article
-
Click through to see the images. Download your free copy today. This issue features the following articles: A detailed livebearers guide covering mollies, platys, swordtails and guppies. The convict cichlid is profiled, including details on a different way to keep the species. Five old favourites – kissing gouramis, angelfish, silver sharks, tetras and the kuhli loach are reviewed. Damsels, mainstays of the marine hobby in the days before protein skimmers and LED lighting, are covered. View the full article
-
Welcome to the club lol..<br /><br />Sent from my GT-I9300 using Tapatalk 2
-
Saw two at coral farm last week
-
Click through to see the images. A lack of dissolved nitrogen in the oceans’ surface limits growth and productivity. This is a practice that is often mirrored in reef aquaria where free nutrients are not desirable. In a recent study published in Nature Geoscience, a team measured the effects over time of warming waters on ocean productivity. It was discovered that increasing temperatures, which cause a decrease in oxygen carrying capacity, increased denitrification or the shift from dissolved inorganic nitrogen compounds (ammonia, nitrite, nitrate, urea) to gaseous nitrogen (N2). While the effects on the ocean overall were significant reductions in oxygen concentrations, in our home systems there is no oxygen limitation and insignificant amounts of denitrification in the water column. However, it highlights the need to have low oxygen environments, like those provided in sufficiently deep sandbeds and internal pore spaces of live rock to help us maintain low inorganic nitrogen levels in our tanks. For more information, see the summary on ENN (http://www.enn.com/ecosystems/article/46053) or the publication. (http://www.nature.com/ngeo/journal/vaop/ncurrent/full/ngeo1832.html) View the full article
-
Click through to see the images. Watching a skilled nature aquascaper in action (in this case, Polish aquarist Dawid Staś) really helps us appreciate the artistry behind aquascaping these types of aquariums. " height="383" type="application/x-shockwave-flash" width="640"> "> ">  View the full article
-
Click through to see the images. Avast Marine's product description: Take great photos of your aquarium from the top down, the way corals are meant to be viewed! This handy look down box is designed to clamp your iPhone or similar smartphone to the top, allowing you to (carefully) dip the housing in the water and get tack sharp photos without annoying lightbulb reflections or surface ripples. A felt-covered clamp bar securely holds the phone to the top and prevents scratches to the screen. The black knob on top provides a secure grip, allowing you to tap the screen to focus and shoot photos with your free hand. The white top plate prevents any glare from overhead lights, and the smoked tube body allows some light in the side without glare or reflections. The entire top plate disassembles with nylon hardware, which allows easy cleaning of the inside lens should dust get inside. Operation is very straightforward: Turn off your phone's flash, then align phone's camera over the hole in the top, clamp in place, and carefully dip the housing in the water and snap photos. Coral vendors may find the Porthole especially useful as most modern smartphones have the capability to automatically upload photos via WiFi, so no need to get out the big camera, take pics, attach camera to computer, download to computer, upload to website, etc. Let the phone do all of that automatically! For more information or to purchase the smart-phone top-down porthole, visit Avast Marine's website. View the full article
-
Click through to see the images. " height="383" type="application/x-shockwave-flash" width="640"> "> "> Thanks reddit :-) View the full article
-
Click through to see the images. " height="383" type="application/x-shockwave-flash" width="640"> "> "> Thanks reddit :-) View the full article
-
You need a species only tank with good filtration to prepare yourself fpr black ink !<br /><br />Cuttlefish eat only live food which can be a problem over the long run.<br /><br />Sent from my GT-I9300 using Tapatalk 2
-
Click through to see the images. Camouflage is of utmost importance to fish, especially in open water where there are no objects to hide in or among. In these instances, many fish use various ways of reflecting light to help minimize predators seeing them. Scientists believed the best method for hiding in open water was using a "mirror" concept, where the fish reflect light as a mirror would underwater. However, recently researchers have found by using Lookdown fish, that certain fish can also manipulate plane polarized light as well making them even more invisible to their predators. Published this month in the Proceedings of the National Academy of Sciences (PNAS), the journal article Polaro–cryptic mirror of the lookdown as a biological model for open ocean camouflage by Brady, Travisa and others documents the phenomenon. Incidentally, the study was funded by the U.S. Navy, which has a keen interest in learning more about camouflage in open water as it would be useful for ships and submarines. More than 60 species of fish can see plane polarized light to certain degrees, so the ability to manipulate this type of light is highly desirable if a fish wanted to hide from its predators. "The nifty thing is when we mimicked the light field when the sun is overhead, as it would be at noon, the fish just bounced back that light field," said Cummings. "It acted like a mirror. Then we mimicked the light field when it's more complex, and the lookdown altered the properties of the polarized light it was reflecting so that it would be a better blend into its specific background at different times of day." The next goal of the research is to understand how lookdowns manipulate this polarized light field. Is it an automatic process where the fish's scales and body naturally reflect light in this way or do the fish actually manually manipulate it somehow. (Via PNAS and EurekAlert) View the full article