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The adaptation of eyes was lost because it gave no competitive advantage.

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15y ago

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What does fish who live in caves have no eyes means?

Most likely the fact that the fish has no eyes indicates that the cave that the fish lives in is very dark, and the fish has no evolutionary use for the eyes. Eyes may also indicate a weak spot where predators can attack, so not having eyes may help with the fishes survival.


What is a sightless fish?

A sightless fish is a fish that lives in a dark cave and the fishes' DNA knows that the eyes are not needed so the eyes go away


Which fished has bacteria living in organs under its eyes which produce beams of light that attract prey and enable the fish to see in the dark watery depths?

An anglerfish


Did the ancestors of sightless mole rats and cave fish have eyes that could see?

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.


Do Betta fish like the dark at night?

Yes they do. They get stressed out if they don't have a hiding place. plants or caves will do.no.


How are fish adapted to living water?

2 ways that Fish are adapted to living in water are gills and fins, or scales ( streamline) and protected eyes.


What animals do caves have?

Animals which live in caves for all or much of their lives include blind fish, a type of arachnid called a harvestman, and crickets. Animals which live in caves seasonally or temporarily, or which shelter in caves include bats, snakes, lizards, bears, mice, rats, and humans.


What are flashlight fish babies like?

When one is underwater they look like their eyes are glowing in the dark.


How do the eyes of the lantern fish help it to survive in the dark?

By sensing the light produced by the special organs on its skin


How do the eyes of the lantern fish helps it to survive in the dark?

By sensing the light produced by the special organs on its skin


How do the eyes of lantern fish help it to survive in the dark?

By sensing the light produced by the special organs on its skin


How do fish get into caves?

Er, SWIM!