Bubble snail ID?

[w00hz]

I’ve found 2 of these in my tank. After some searching I’ve discovered them to be a bubble snail however I’m not too sure if it’s Bulla gouldiana or something else. I’m curious to learn more about them. So far they seem to enjoy eating algae off my glass and nori clip. I only see them at night when the lights are off and they seem to burrow in the sandbed.

 

[Boreas_SA]

Looks like gouldiana, do you know where they came from? Gouldianna seems to be Eastern Pacific

 

[w00hz]

I’m not too sure, I suspect maybe a few eggs got into my tank from adding seawater? I’m in Southern California