If your feeding your tank anything that breaks up into smaller particles the crab will find what it wants. Be careful feeding too much cyclopeeze though.
Webs could be vermitid snail. They live in tubes and throw out webs to catch food. You probably won't see the worm itself and maybe not even the tube. They are pretty harmless but can irritate corals if their nets are too close.
Easy with the dino talk
Webs could be vermitid snail. They live in tubes and throw out webs to catch food. You probably won't see the worm itself and maybe not even the tube. They are pretty harmless but can irritate corals if their nets are too close.
Easy with the dino talk
