Oval coral growth ID?

[salajander]

I'm seeing a lot of this oval-shaped coral growth here and there around my aquarium.

Any ideas what it is?

https://lh3.googleusercontent.com/LbhBQpOvIZPw4ku2CuJg_6jzYxTPinAanV61QyOb_p2C=w800-h600-no
Click to embiggen
(https://goo.gl/photos/h6YUdvXh8fbvvGWv9)

[salajander]

Any ideas?

[salajander]

One more bumpity-bump.

[Sugar Magnolia]

It looks like the remnants of nerite snail eggs.

[salajander]

Huh, wouldn't have guessed that - thanks.