I can't focus, it's too small. Also, there are two white clumps on one piece of bogwood. I can't tell what they are. Maybe snail eggs. But I can't find any worms. As soon as they touch something, they seem to burrow into what ever it is.
An invertibrate resembling to a freshwater anemone. They're relatively small and stick to surfaces. They can curl up so that is what made me think of them.