francisongkt

My tank

Hi friends, hope you can help to identify this centipede look alike creature. is it harmful to the habital? attached is the creature and my 2feet tank. with 2 crown fish.

hi bros, anyone can help? I just set up a 1.5ft tank. got a filter(hook beside the tank type), fine sand, sea water($3 for 25liter) and some rocks(coral). The shop people told me that after setting up, at least 5 days later then can put fish in the tank. So after 5 days, i got 8 crown fish in. but after 3 days 4 died, then 3 died. now left with only 1. i fed them with dry food, which state fast sink, but it did not. pls help, should i continue to put fish in? should i get an anemone for the crown fish(maybe they got no place to rest, so die) Help needed....thanks