i dont have the silky shark or the twin fin spon how do i have them. i have the other two though

If you want those fish, it is pretty much going to be from eggs. It is incredibly hard to breed them. The easiest way to do so is to save up for buying eggs. The beginner eggs will come up with the Silky Shark often, and off and on the Twin Fin Spotanus.

So, my best suggestion for you is to save up for a few sets of beginner eggs, then hope for the best. - Unknown Reader.