Yeah thats what I thought. My tank is at room temp. My buddy who wants to house one of them...has a 155 gal. tank at 80 degree's and I want to make sure they will be okay.
65d? no way. Well ya but he will be a sleeping giant... mine goes into sleep mod around 70... i diss like it. Cuz then they sit on the ground and dont move all day long. So i have to keep mine around 75 just to see him move around some more and take food from me.
Mine is kept at 74-78, room temp depending on season. Though they are very much capabile of handling 80 F or even higher I would not do it for an extended period of time.
Yeah my tank has even been lower then 68 degrees. Pretty much always active. I also have lots of plants to cover half the light. Mine seem to stay pretty active even in colder water.