The idiom "the best fish swim near the bottom" suggests that the most valuable or exceptional individuals or qualities are often found in less obvious or overlooked places. It implies that true worth may not be immediately visible and that one should look beyond the surface to discover hidden talents or insights. This saying encourages appreciation for depth and substance rather than superficial appearances.
"The bottom line" is an idiom that means the final result and comes from the line in a financial statement that shows net income or loss.
to have more important things to do
This is not an idiom. Idioms make little or no sense unless you know the definition. This sentence makes perfect sense, so it is not an idiom. The dead fish smelled so bad that even as high as Heaven, you could smell them.
It means that is is just the best of the best! :D
It means that the thing which is being referred to is totally unnecessary, just like a bicycle is not needed by a fish.
If you think about this, you can figure it out. If fish are trapped in a barrel, how could they get away from a gun? It means something is ridiculously easy.
The fish maybe have a pregnant.
This is an idiom. Getting to the bottom of something means you are going to get the truth about something. It also implies that a certain amount of investigation will need to be done before the truth comes out.
That is not an idiom. It means exactly what it says, although it is probably an exaggeration because it's hard to judge all the fishermen who ever lived and say that one was the best.
The reference to "fish" in a conversation could be a euphemism to change the topic or introduce a non-sequitur. Similarly, the idiom "like a fish out of water" describes feeling uncomfortable or out of place in a particular situation.
The idiom "eagle eye" refers to having an acute eyesight, or an intently watchful eye. It refers to the sharp eyesight of an eagle, which are known for seeing fish from hundreds of feet up.
RFP is not an idiom. It's an abbreviation.