Scales protect the fish from its environment. They overlap like shingles on a roof so that the skin of the fish is not exposed. As a fish grows, their scales produce rings much like a tree-and that is one way scientists can tell how old a fish is.Most fish get extra protection from a layer of slime that covers their scales. This slime helps them move through the water better, and keeps pests off of the fish skin.s a fish grows, their scales produce rings much like a tree-and that is one way scientists can tell how old a fish is. Most fish get extra protection from a layer of slime that covers their scales. This slime helps them move through the water better, and keeps pests off of the fish skin.
Inside a Muffler. Located inside the muffler is a set of tubes. These tubes are designed to create reflected waves that interfere with each other or cancel each other out. Take a look at the inside of this muffler: The exhaust gases and the sound waves enter through the center tube.
A die-cast Screaminâ EagleÂ® medallion and a selection of end cap designs (sold separately) are available to provide an extra custom touch. Screaminâ EagleÂ® Street Cannon Performance Slip-On Mufflers fit 50-state 2009-later Touring and Trike models, except 2010 Street GlideÂ® and Road GlideÂ® Custom and models equipped with 110 CI engines. Installation requires separate purchase of muffler clamps and end caps. For more information, visit Harley-Davidsonâs Website.