I would LOVE seahorses...and really thought about that, and have done research before on another site....it's so hard because with this tank i have to try and make it the best ever,lol...and so i love the seahorse idea, i just want it to be active, which is where other fish like you mentioned come in, but still....haha, i dont know....and i really like the octopus idea as i didn't know how intelligent they were with needing toys, etc....i think that would be amazing to watch..but i'm afraid of it sneaking out and dying....and i know you can try and fix it, but that there may be things that are not taken in account and messed up...so i dont know, a lot of thinking to continue doing, so keep the ideas rolling! thanks a lot teresa for that one! I have a while still because i need a stand for it....plus lights, and everything else...i'd kind of like to not need a big lighting system so i can cancel out some of that money there.