Cyano is typically a maroon type color (but not always) and you’ll see lots of air bubbles. Dinos usually are stringy and a tannish brown color, also with bubbles. Both will blow easily off of sand and rock. If neither blows away and disappears easily, it’s probably something else. Use a turkey baster to try to blow them off. I second that a microscope is necessary for a more positive ID.
See its strange cause ive battle dinos before. And currently this stuff is not on my rocks but all over the sand bed. It will covered my zoanthids and start killing them if i leave them on the sand bed so ive moved them for now up higher. It almost looks like a mix of dinos and cyano. Like dinos got together with cyano one drunken night at the bar and did stuff they were not supposed to and poof a hybrid popped out.