jonocoombes
Aquarium Advice Apprentice
- Joined
- Mar 18, 2017
- Messages
- 37
It might be a sweeper tentacle stinger. Might be looking to whack that green star above it.
Mechanisms of Coral Aggression and How to Control It
Not a sweeper tentacle. That would be the coral simply pooping out something large that it ate. You can see this out of anemone too.
A sweeper tentacle wouldn't be coming out of a coral's 'mouth' nor would it be brown.