Teeth for tearing, not chewing line their wide mouths. They don't have pectoral and pelvic fins, lending them a snake-like appearance. There is a dorsal fin which runs the length of the body. Speckles, stripes, freckles and tattoos, are all terms used to describe their patterns and they appear in colours including black, white, blue, green, brown and yellow.ĭespite their differences, there are many common features among the different species. Morays come in a variety of shapes and sizes, from 25 cm ribbon eels to a full 4m of giant moray. Scientific name: Muraena Distinguishing Features What a magnificent creature! Moray Eel Fact Sheet Unlike any other creature on the reef, it is usually concealed in a crevice with little more than its large head protruding, flexing its jaw and seeming to stare out at you with an expression of alarm. None does this better than the moray eel. There are some reef creatures that simply make divers stop in their tracks, snap out of their general reverie and focus on them. The underwater world has many beautiful sights and, diving along a reef, you can spot innumerable fascinating forms of life. Additionally, woven screens have more natural variations in their thickness and pattern, and are therefore effective in reducing alignment with the projector and reducing the effect of moiré.īefore buying any projector or screen, speak to someone qualified in projector hardware to ensure that your setup will be compatible and free from the moiré effect.> Newsletters > June 2013 >Diving with Moray Eels Moray Eel Newsletter That's a Moray The moiré effect can be prevented by the use of a smoother projection screen to view HD images on. Having said that, there are specific ways to ensure a smooth experience on your projector screen. Regardless of what some advertisements claim, there is currently no such thing as a full-HD or HD-ready projection screen. Moiré is becoming a larger issue now with HD projection monitors, as the higher resolution makes the visual more susceptible to imperfections in a coarse screen. The pattern of the screen overlaps with the field of the pixels, creating the moiré effect. This can occur when the projection screen has been weaved too loose, in the case of a woven screen, or has an uneven patterning. Moiré occurs when the natural patterns on your projector screen align with the pixel patterns of what is being projected, merging to form lines that run across your screen. Particularly bad cases of moiré will give you feeling that you are viewing your screen through a mesh door. This is often the case with screens made from fine fabrics. However, if a pixel can be seen in detail it is the projector which is causing the problem. The problem is related to resolution if a pixel cannot be seen a very short distance from the screen, then it is the projector screen that is causing the problem. On projectors, it often has to do with the pixellated image from the projector being interfered with by the weave pattern of the projector screen. They might also appear on a regular TV when people on the screen are wearing striped clothing, creating an almost 'strobe-like' image. The moiré effect refers to the lines you may see on your projector screen when you are trying to watch TV or a film. Photo courtesy of ednl, used under the CC BY 2.0 license.Īs the resolution in projectors grows, the difference between projector and projector screen is also growing, and increasing the risk of what is called the 'moiré effect'. Flashing lines across the screen display the moiré effect.
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