Some do, some do not. There is a great site that you can find out all the info you'd like. See the link
Yes, DMT is known to have hallucinogenic properties.
Caffeine belongs to the family of stimulants. It is the opposite of depressants, and has no hallucinogenic properties.
eaten by fish is that a habitat and niche
Lion fish can not be eaten.
I believe that there is a fish that of you eat you will start hallucinating.
The hallucinogenic properties of LSD were discovered by Dr. Andrew Hoffman.
Cannabis is both a depressant and a euphoric with mild hallucinogenic properties.
Yes. It happens regularly.
Yes, algae will be eaten by zooplankton, which will then be eaten by forage fish, anf finally eaten by ......game fish (which will get consumed by sharks and so on)
no some get eaten while they are in there shell
I would say more than 75 % of all the fish eaten are eaten by other fish and wild animals.