Living grains of sand?

[Renaissance corals]

That is strange, I don’t have any leads on what would move in that way. They all appear to generally have the same shape, I’m puzzled by this one.

I should probably also include that there are thousands of them they seem to be eating detritus too

 

[Anemone_Fanatic]

What on earth... Are they maybe baby hermit crabs using sand grains as shelter?

 

[Renaissance corals]

What on earth... Are they maybe baby hermit crabs using sand grains as shelter?

While it would be cool to be the first person to successfully breed blue leg hermits in captivity The only hermit that has ever been in that tank was a juvenile blue leg ( now adult) and has remained the only hermit ever to be in the tank. But dang I wish

 

[Propane]

My cerith snails have had that same sort of thing dragging around behind them.

 

[Renaissance corals]

My cerith snails have had that same sort of thing dragging around behind them.

Fun fact I've never actually had cerith snails the closest would be their shells being used by hermit crabs

 

[Kasrift]

What are these? I found them in my dry rock cycling tank.
They are about the size of fine sand. At first I thought it was calcium precipitating out until I noticed them moving. They prefer to crawl around or get carried by the current.

(Please excuse the audio on the video) thanks

I don't have any answers for you, but they look like baby money cowrie or similar shaped snail. @ISpeakForTheSeas is great at IDing things!

 

[Renaissance corals]

I don't have any answers for you, but they look like baby money cowrie or similar shaped snail. @ISpeakForTheSeas is great at IDing things!

Only thing is they don't move like snails they waddle when they move. Also i don't have any snails in the tank. Thanks for calling the cavalry

 

[vetteguy53081]

What are these? I found them in my dry rock cycling tank.
They are about the size of fine sand. At first I thought it was calcium precipitating out until I noticed them moving. They prefer to crawl around or get carried by the current.

(Please excuse the audio on the video) thanks

Looks like baby nassarius or pyramid snails

 

[Kasrift]

Only thing is they don't move like snails they waddle when they move. Also i don't have any snails in the tank. Thanks for calling the cavalry

Tiny snails have a waddle type motion. I have lightning dove snails that reproduce and the tiny babies look like grains of sand and wave a slight bit like the video you posted.

 

[Renaissance corals]

Tiny snails have a waddle type motion. I have lightning dove snails that reproduce and the tiny babies look like grains of sand and wave a slight bit like the video you posted.

Interesting. Still don't know where they would have come from. Tank setup( dry formerly live sand, dry rock. I have put a Coral or two in but the tank they came from doesn't have the little critters either.

 

[Renaissance corals]

Looks like baby nassarius or pyramid snails

Just don't know how they could have gotten into a sterile set up. And definitely didn't hitchhike from my 40 on the corals

 

[Mr_Knightley]

I have had these in the past. They are either a type of amphipod or mole crab-like animal, the ones I've had were generally opportunistic but would hang out around the mantles of my LPS and irritate them. We will need a closer picture to confirm.
Are they shaped sort of like little bullets?

 

[Court_Appointed_Hypeman]

What are these? I found them in my dry rock cycling tank.
They are about the size of fine sand. At first I thought it was calcium precipitating out until I noticed them moving. They prefer to crawl around or get carried by the current.

(Please excuse the audio on the video) thanks

Can we get a longer video?

They look exactly like baby snails but time lapsed.

Edit: it does not seem like a video that has been sped up, to be clear, just very similar movement.

 

[vetteguy53081]

Just don't know how they could have gotten into a sterile set up. And definitely didn't hitchhike from my 40 on the corals

Could have come in with bag water from fish or coral purchase, Chaeto and even purchase of store water

 

[Renaissance corals]

Can we get a longer video?

They look exactly like baby snails but time lapsed.

Edit: it does not seem like a video that has been sped up, to be clear, just very similar movement.

Ill post a longer video tomorrow.

 

[Renaissance corals]

Could have come in with bag water from fish or coral purchase, Chaeto and even purchase of store water

Everything live stock related came from my other tanks-(clear of the critters) and i run an rodi into a mixing tank.

 

[Renaissance corals]

I have had these in the past. They are either a type of amphipod or mole crab-like animal, the ones I've had were generally opportunistic but would hang out around the mantles of my LPS and irritate them. We will need a closer picture to confirm.
Are they shaped sort of like little bullets?

About to order a digital microscope

 

[FoolishWizard]

 

[Renaissance corals]

dang right. I have micro mysis shrimp in one of my tanks i have no idea where they came from took a long time to figure out what they were.
-+1mm long

 

[Renaissance corals]

Update: microscope is nine stops away so as soon as I get off work I'm going to get it set up and get some real close pictures of these things. Like we're going to find out if they have legs or not kind of close