First, I had a Spotted Sweetlips. After returning from my holiday, I found the fish missing.
I thought it had died. Since there were no bones or any traces of the dead fish,
I thought the cleaner shrimps might had done a great job.
But, few days later I bought a Percula Clown and it went missing again just
like the Sweetlips. No corpse found. I want to find this silent killer!
I saw a small crab yesterday hiding under some rocks but got problem
trying to catch it because it dig into the sand bed. Is this crab a possible
killer who leave no trace behind? Any way to get rid of this crab?