Your probably not taking care of them right that's why and they don't just die like that.
No, they are not invertebrates. While shaped differently, they are still simply fish which are all vertebrates, since they have spines (just like you and me!)
Yes they can eat vegitables, Plecostomus are Herbivores. Some people call them carnivores because they suck onto your fish. However this only happens if they are starving, They are not trying to eat your fish they are just trying to suck the algae off of them. This can kill the other fish because it also sucks the slime off of them.
it is hard to tell with fish but, i can think of 3 things; a:its pregnet;b:i believe fish get gas too... and c: it is just fat
Some fish dont care for there young and just leave them there, though other fish care for there young until there old enough.
Plecostomus are famous for attacking and eating goldfish! NEVER put them in a pond or aquarium together. Many people think that plecos are vegetarian, but they are omnivors. If they are hungery, they will eat what ever they can get in their mouths, and gold fish don't swim that fast! Seperate those fish or in time your goldfish will be gone! As long as you are feeding it okay then it shouldn't eat your other fish.
you would eat fish
if you mean a baby fish, well, the name for a baby fish is a "fry" just like how a baby dog is a "puppy"
I believe would be easier to just fish them out !
You would just have to try it. It would be your opinion
Just think of anything eating anything else. The most obvious would probably be a shark eating just about anything. Cleaner wrasse eating parasites off a host is an example, Parrot fish eating algae and polyps, plecostomus eating just about anything growing on rocks or on the sea bed. Keep in mind that predation is not reserved to just carnivores, even a cow eating grass in a form of predation.
Baby fish look just like little tiny fish - they're hatched looking pretty much the same as they look as adults only smaller.
They just see to their young until hatched. After that, the kid are on their own.