Fish just... disappeared.

ACBlinky

Premium Member
Over the last week I've lost two perfectly healthy fish, and have no idea what's going on. The watchman goby, who was a very bold guy and ate hugely, and the longnosed hawk who seemed happy, always out hunting pods, cruising the water column at feeding time... they're just GONE.

I haven't lost any turbo snails, but I do seem to be missing blueleg hermits -- the large Hawaiian hermits (1" or so) are fine. I can't find either emerald crab, but they do both hide a lot.

I've got a bullseye pistol shrimp, and spot feed him regularly, would he kill fish or hermits? he used to hang out in the rocks, but has recently built himself a lovely little lair at the bottom of a large rock structure. He's an active little guy, always running around and we hear him snapping all the time, but he stays within an area smaller than a cubic foot; the fish have lived with him for ages, but I'm wondering if he's more of a predator than other, symbiotic pistols are? I know bullseye shrimp do occasionally pair with gobies, but not often.

The possibility of a hitchhiking predator is quite small - most of my rock was dry, only about 25lbs was live, and there weren't any huge pieces with deep holes where evil could lurk... I haven't seen anything larger than a stomatella or feather duster emerge from the LR.

There are some hydroids on one piece of LR, could they sting a perching hawk or goby?

Could a 3" mini carpet anemone sting a 2" fish? I know a maxi-mini couldn't consume something that large, but is it possible they were stunned if they tried to land on a nem?

I'm very sad to have lost these guys, and still have a tiny bit of hope that they're just hiding; they are small, and the tank is big with lots of rock, but they were just such 'in your face' fish I can't imagine them disappearing for days. Any thoughts?
 
I lost a 4.5" diamond goby, completely gone, in a 65g tank. If you're sure they didnt go carpet surfing, I would check your filters. I've even had a clownfish make it all the way down to the sump through an external overflow. If no avail, then you have a good clean up crew.
carpet anemones can eat some crazy big stuff, not sure about mini's. I had a gig swallow a MASSIVE brittle starfish, I know he swallowed it cuz days later he threw it up.
 
Thanks for the reply, I'm so confused!

I found the larger emerald crab, but there really seem to be NO small bluelegs left (there were 15 initially). The cleaner shrimp and clownfish are fine. There's no sign of a body anywhere, but between two shrimp, 10 nassarius, 12 big hermits and bristleworms I'm not surprised.

I'm still looking, still holding out hope, but I think they're toast. I want to purchase another goby and hawkfish, but not until I figure out what did these two in.
 
I figured with two potential deaths, it would be prudent to do a good-sized water change. I mixed up some SW, drained old water from the tank and made sure I vacuumed every bit of sand I could reach (it's a VERY shallow sand/CC bed, I vacuum it during every water change). No bodies, no evidence of anything.

I thought I might as well siphon the detritus from the overflow as well. Imagine my surprise when I startled BOTH fish, who were happily messing around in the muck, 30" down in the dark, unreachable corner of the overflow.

It took a lot of swearing, some creative leaning and scooping with a long-handled net, and about a gallon of water all over the floor, but both little twits are back in the tank. I have NO idea how (or why) they got into the overflow. I did see one very small hole, where they may have squeezed through, so I blocked it with a piece of sponge.

I guess it's a happy ending, and I learned a lesson -- check, check, and check again before you give up! I had looked into the overflow countless times, and never saw them. I'm SO glad they stayed at the bottom and didn't try riding the 2" drain pipe into the sump... I can't imagine them living long in a filter sock being bombed with water at 600gph >.<
 
I have the same thing happen to my watchman goby every other night. the first thing i do in the morning is check the overflow and the filter pad in my sump. I watch him at night and he just floats at the surface when he sleeps and i guess accidentally gets sucked in
 
I have the same thing happen to my watchman goby every other night. the first thing i do in the morning is check the overflow and the filter pad in my sump. I watch him at night and he just floats at the surface when he sleeps and i guess accidentally gets sucked in

Some watchman he is *snore* :-)

Be careful with the fish in the pipes though. My clown went through every now and then -- then went on vacation and one of my cardinals went in but not out. Came back to half a dead tank full of algae. :-(
 
Yikes!
Does anyone know if it's alright (or smart) to put some sort of grid over the end of the drain pipe? Seems to me it could cause problems if it ever became even partially blocked, but it could prevent fish from riding the drain into the filter sock of death...
 
i have seen pictures of people using gutter guards on their overflow box and thats what i plan on doing whenever i make it out to home depot
 
I had a watchman goby disappear for 2 weeks. After randomly looking into the sump catch tray to clean I found mister Goby. He was still alive in barely any water :S
 
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