yes but what is it to youAs with most fish, perch fish do not have eyelids. They are, however, covered by a layer of transparent integument or coating to keep the eye protected.no a perch fish does not have eyelids but they have viginas
no.
This depends on the species. Some fish have a harder coating over themselves than others.
You could use a clear varnish.
It sounds like your fish has fungus over its eyes and skin. That indicates terrible water conditions. All fish need to have clean water. Change the water! Successfull fish keepers change at least a part of a tanks water weekly.
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Yes. But before they were located in the areas they are today. Ex: Cave fish had eyes when they were fish. Once they moved to caves they lost vision over time.
Fish tanks can turn white for a variety of reasons. Many fish shops can test the water if a sample is brought in. Typically white water is due to not being circulated or over feeding.
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If your old epoxy is good then you can apply over it, but there are many facts to consider before applying over existing epoxy coating.
Fish tanks can turn white for a variety of reasons. Many fish shops can test the water if a sample is brought in. Typically white water is due to not being circulated or over feeding.
Fish eyes have a tough layer of scleral tissue covering their eyes, allowing them to see in water and eliminating the need for lids or coverings over the eyes. This means that a fish will not be able to clearly see us unless we are in the water with them, if they are looking out of a bowl or aquarium the glass would distort their vision.