Do Goldfish Have Eyelids

Do Goldfish Have Eyelids?

The exception to this are the sharks, which do have eyelids. Fish cannot close their eyes and therefore cannot blink. There are even fish species that have no eyes. Why don’t goldfish have eyelids and lacrimal glands? Fish have no eyelids … Read more

Do Aquarium Fish Sleep

When Do Aquarium Fish Sleep?

Starting up aquarium fish, many owners ask themselves – are their pets sleeping? Of course, fish, like all living things on Earth, need sleep. However, this process proceeds in a special way for them. Sleep … Read more