Its a soft shackle I believe.
Looks like a soft shackle attached to another line via a prusik.
Is it a true soft shackle though? It may be hard to see in the picture but there is no adjustable bury. Basically a locked brummel with fixed bury and the adjustable part is sort of a half brummel.
Yes that's a variation of the soft shackle that is very useful. Since it doesn't have a bury, it's slightly easier to use your fingernails to grab the loop and open it.