can these also be a bluish see through color?
There are many different types of Aptasia. The ones I've personally seen is the brownish kind, as seen here... A white type, which I thought looked cool. Last but not least a green type.
Although, some desirable coral kind of sorta looks like them to a beginner, so be careful.
If it's a smaller tank Peppermint shrimp will clear them out fairly fast in groups. Although they are reported to eat polyps after the aptasia is all eaten. I have 3 in my 20 gallon, they don't mess with any of my desired corals and eat brine shrimp.
For larger tanks a File Fish is a possibility. Although the same is reported for them as the shrimps.
Copperband Butterfly Fish also are known to eat aptasia, but I would never recommend one. They are very anemic.
As for AiptasiaX you have to do it every day to get anywhere with it.