Dozen of yellow tail damsels?

[HAAAAAAAA]

I have a 150 gallon tank full of rock and a whole pipe system for a tessalata, my tessalata has no tolerance for any large fish so I thought of adding a dozen yellow tail damsels just to add some activity to the tank but, i had heard that damsels usually just kill themselves is this true? If so, are there any alternatives? I just want a species which stays really small about under 4 inches and are active which stay together

 

[Waters]

A small school of damsels in that size tank should be fine....they are territorial but will find their own spots....the ones that don't get eaten by the eel anyways lol.