RBA stuck in HOB intake. Will it live?

[ReefWitch]

Included two images with blues and two images with whites. I (think?) The foot is still intact. I came home from a 12 hour shift to find it with a bit of itself stuck in an intake for my hob filter. I turned the filter off and managed to convince it to let go and got it unstuck. I put it back on the rock work but it looks bad. I need to know if it will survive? How can I help its chances?

 

[ReefWitch]

Update: it's foot has reattached itself to the rocks.

 

[ReefWitch]

Top down view