Hydrogen is not poisonous.
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
No. Hydrogen is not poisonous. However, it is extremely flammable.
is a flounder poisonous
Yes they are poisonous.
Yes, the Puffer Fish is a poisonous type of fish.
Two of the most common poisonous fish are found in the Red Sea, these are,The Lion Fish and The Surgeon Fish
Stonefish and Lionfish are poisonous