White Spots on Rocks

[mickeyfish]

Are these a form of algae or possibly Nerite snail eggs?

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[mcgyvr]

Pic too far back and not clear enough

 

[mickeyfish]

Tried for a better pic.

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[kfisc]

I still can't quite tell from your photo, but search photos of tunicates and small sponges; a guess is they may be one of those, especially if you don't have any nerite snails.

 

[mickeyfish]

Well, I do have many Nerites so that is not out of the question. Couldn't find any sponge or tunicate pics that looked quite like the spots.


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[mcgyvr]

Google images search for "nerite snail eggs" and see if that matches what you see..

 

[AlSimmons]

Spirorbid worms maybe?

http://reefkeeping.com/issues/2003-05/rs/index.php

 

[mcgyvr]

I switched to a different computer and the last posted picture is a Nerite egg for sure..

 

[mickeyfish]

I tried for some better pictures for confirmation. These are appearing all over my rock work.

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[AlSimmons]

Do these things have any depth to them? Nerite snail eggs are usually kind of flat and resemble sesame seeds. From the top to the bottom those first two white spots in the pictures look like sponges IMO. Also, eggs usually aren't deposited all over the place. IME there's usually just a cluster of them in a fairly small area. Do you have any snails that resemble the ones in the link below?

https://www.advancedaquarist.com/2003/9/inverts

 

[mickeyfish]

I switched to a different computer and the last posted picture is a Nerite egg for sure..

If they are, will these hatch or likely be eaten by the hermits or fish?


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[AlSimmons]

If they are in fact snail eggs some might survive, but the majority of them will either be eaten by something else or removed from the system via a skimmer, filter sock, water change etc.

 

[mickeyfish]

Do these things have any depth to them? Nerite snail eggs are usually kind of flat and resemble sesame seeds. From the top to the bottom those first two white spots in the pictures look like sponges IMO. Also, eggs usually aren't deposited all over the place. IME there's usually just a cluster of them in a fairly small area. Do you have any snails that resemble the ones in the link below?

https://www.advancedaquarist.com/2003/9/inverts

No depth. They are flat and distributed all over the tank. I have about a dozen nerites as seen below.

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[AlSimmons]

Oh, well there's your answer right there.

 

[mickeyfish]

So what is the likely scenario? Will they hatch and overrun my tank? Get eaten by the hermits or fish?


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