white spots on rock

pelicansreef

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ID of white spots on the rock. First and last picture is in tank on rock. second and third pictures are some of the spots I scraped off a snail shell. They have grown over the last few months and don't seem to bother anything. They have a hard outer shell and are almost like small round dots. they don't seem to be live creatures but maybe something like coralline alga however it is white.

It is spread throughout the rock

spots on rocks.jpg spots off rock.jpg spots off rocks1.jpg spots on rock1.jpg
 
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Mibu

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Snail eggs.
Really? Mine don't ever seem to hatch or move. And this is what is on my rocks.

3 nerite snails, 1 turbo, 4 trocus snails maybe 1 turban snail. I don't know how many ceriths I have left. 4 hermit crabs. If they are alive still.
 

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anthonygf

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Really? Mine don't ever seem to hatch or move. And this is what is on my rocks.

3 nerite snails, 1 turbo, 4 trocus snails maybe 1 turban snail. I don't know how many ceriths I have left. 4 hermit crabs. If they are alive still.
Most get eaten by fish and crabs.
 

IS RTN/STN MORE COMMON THAN IT USED TO BE?

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