White strings growing on sea apple, need ID

[Connor4410]

The apple is acting healthy. I think the strings started thinner and spread a bit. I recently seeded the tank with a reef stew of pods and plankton, if that changes anything.

 

[BloopFish]

Might just be mucus secretion from the sea cucumber. They can be quite slimy sometimes.

 

[35ppt]

Looks like sandy mucus.