what is this

[Fishward]

I think its probably a combination of a few things.. the first two are typical dinos.. had them in my tank a few weeks ago and they have not come back yet.. (fingers crossed)

I blacked out my tank for a day and a half (towels up),
fed less,
and then ran my tank on a 3 hr photo perdiod for about a week.
Started dosing Sodium Bicorbonate for alkalinity and starting CA and MG this week.

Bubbles are the ID (+1 to christy) if they're making bubbles, its Dinos. but i also agree that that last photo doesnt really look like dinos to me.