neokn,
I don't keep them anymore.
My 1.5ft temp tank for stuff i catch from beach used to have about 5 max.
They fight till left 1 and even the King lost a limb.
csloo,
Its their nature. They usually share their burrow with gobies.
The gobies are their sentry. Seems that gobies have better eyesight.
Dazza,
I have never seen a black piston shimp b4.
If i see any, I'll catch it to take photos.
After my photo session, i'll pass to you loh.
Thanks for the replies !