You'll have to be careful about species selection, if you're just planning on finding a couple creatures and throwing them in a tank together then I would agree with the others. You have to do proper research if you're going to try these two as tank mates, and no this doesn't count as research.

Don't get me wrong, I'm saying this may be possible but to pull it off it will take someone with experience with both octopuses and seahorses. For example if you want to find out if something is poisonous do you drink it?

thanks again
 

thats why i was wondering if they would get along or if any one has these guys in a tank together because red deer reptile told me it was ok and it kinda scares me !!!!! they would look cool together but not cool if the octopus thinks of them as lunch.

Seahorsestarter ,Welcome to Canreef. I'm not sure if I would try to keep a Octo together with a seahorse. A good place to ask that question is tonmo.com a site dedicated to octos and cuttlefish. They have a good understanding to what can be kept safly with octos.

Chris

thanks chowder!!!!

And don't always believe what a LFS has to say and most definetly not the one you are talking about.
Do some research before you jump in to anything....:)

+1 Always research yourself before you buy--it'll save you both money and heartache. Welcome to Canreef seahorsestarter. You are doing the right thing asking questions. :)

As well as checking out the site for octo's, check out the best for seahorses.
http://www.seahorse.org
Seahorses, while occasionally surviving in reef type settings, have a very poor survivability in those settings.
For increased odds of survival, there are conditions that make it better, but many aren't interested in doing what it takes.
i.e.
Temperature 68° to 74°F max, to lessen the chances of bacterial infestation that they are prone to. (bacteria grow exponentially with each degree rise in temperature)
Species only tank, even to keeping the same species from the same breeding source preferably, as seahorses have grown up living with certain pathogens but many times succumb to pathogens other seahorses/pipefish carry as they haven't built up any immunity to them.
Buy TRUE captive bred tank raised seahorses that haven't encountered seawater. While the "net pen" or "cement container" raised ones come cheap initially, it's not cheap when the odds of loosing them are so much greater, or if you have to buy expensive medicines (some next to impossible to get now in Canada) to try and treat their afflictions.
Unfortunately, most seahorses labeled "tank raised" now come from places like Vietnam that use seawater in cement containers.