No Fish do not have periods.
For short periods it is fine. For longer periods sickness will occur due to a lack of needed nutrients for tropical fish that is not found in goldfish food. This is from personal observances.
No. They can survive on land for short periods, but they do not have legs.
It is absolutely ok to have a lamp by the betta fish tank, just make sure its not on 24/7, as fish need dark and light periods to function normally.
Pandas are not able to swim for very long periods of time (I'm not sure if they can swim at all.) Fish can swim for long periods of time so they live in the water, pandas can not.
only people have a menstrual cycle but mammals have something called Estrous cycle and there is sometimes bloody discharge. fish are not mammals and they don't have it.
If you are not used to fishing, it is very possible that you will be tired. It may be best to fish for short periods of time.
A mudfish refers to any of the several elongated fish that have the ability to survive long periods of drought burrowing in the mud. These fish belong to different genus and are therefore only related on the habitat and behaviours.
Naturally, the increase in algae would mean more potential for fish to not die from hunger. Having a larger food base would mean more food for the fish, and more baby fish being able to survive during their vulnerable life periods.
Salt mackerel is a type of cured fish. Being dead the mackerel can no longer see anything.
There is no known fish that solely feeds on human flesh and can survive on dry land. Some fish, like piranhas, have been known to bite humans, but they primarily feed on other aquatic animals. Fish are not equipped to survive for long periods on land.
Most fish, including tropicals, do not get pregnant. Pregnancy involves carrying young internally. Only a small sub-sect of fish carry young internally; those that do have gestation periods ranging from 10 days to over a year.