I had 2 different Diamond Watchman gobies for 2 years each...2 separate tank crashes did them in. For some reason neither of them were jumpers, no idea why not, though, as most of them do jump looking for a better tidepool. I had a canopy, but it was open on one side, so they had plenty of opportunity. Neither one of them was the least bit nervous/jumpy and were always watching me.
I had a 6-spot sleeper goby for a year, he just died a few months ago & we have no idea why so I wouldn't recommend one. He was a huge mysis hog & would eat until his belly was huge. He was definitely a jumper (earned his non-kid-friendly name by jumping into the overflow his 1st 30 minutes in the tank). He was also an extremely annoying pacer. He paced from the time the lights came on until he got fed, then he'd stop for an hour or so & start back up again until lights out. He'd pace himself to normal, healthy tummy size, then pig out to a big belly. Every day.
So are you just looking for a goby that will stay on the bottom, or is there a reason you want a sifter type even though not necessarily to sift? We've had our orange-spot for over a year now & it's fat (ridiculously so LOL). Every great once in a while it will grab a mouthful of sand, but not often at all as it's more of a shrimp goby. He also won't dig his own burrows (the other one dug them all), so he sleeps behind some rocks.
He's also a camera hog. If I take pics of corals, he comes out and hops at me until I take his pic LOL. Typical goby behavior, watches us when we're doing anything close to the tank.
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