betta are not harmful to people and most tropical fish. However, there are some very common fish that are poisonous. Most of the common plecos with spines can be toxic to tropical fish if they are dumb enough to peck at it. If you feel that another fish you own will get sick from being around your betta, odds are the two can live together happily and healthily. If another pet, like a cat or dog swallowed your betta, I wouldn't worry. I have never heard of pet poisoning from eating tropicals.
No, but things in your saliva that may have been in food may be
is a flounder poisonous
Yes They have Saliva that can attack your Central Nervous System.
no
yes it is very toxic from the saliva
it doesnt depend on gender, they are not poisonous to anything, go ahead and have sushi
human saliva is not poisonous
No.
No, but things in your saliva that may have been in food may be
Poisonous fish will have poison gland on them.
only some fish are poisonous to humans
No! :)No freshwater aquarium fish to my knowledge is poisonous.
Pufferfish is one of the most poisonous fish in the world.
yes
is a flounder poisonous
Yes they are poisonous.
Yes, the Puffer Fish is a poisonous type of fish.