@r with the [name=] specification

I wanted to know if the @r command works with the [name=] specification, aim trying to make a underwater map with randomized fish using invisible squids and i want to only select the ones named squid (meaning the unnamed ones since a squid's default name is squid)

Yes it does, but you have to specify the type of mob it is, or it won't target entities. As per the wiki:

When used without the type argument, @r always targets a random player. The type argument can be used to target non-player entities [...]

Here is a example:

/tp @r[type=Squid,name=Random] ~ ~3 ~

This would teleport a random Squid with the name "Random" 3 blocks up. Hope this helps!