LFS says Goniopora, by the pinuals I see I'm thinking Alveopora. Issue is that it will not extend (so not 100% sure). New t5 (8x54) located at the bottom of 75gal. Was thinking flow problem so moved to calm corner, when lights went out and moonlights were illuminating, i had extension of approx 1/8" to 1/4". This morning when moon lights came back on (5:45) same (did not recede after lights out), at lunch with all 8 t5's, closed up tight. I moved it to a shaded area under an overhang away from flow... any words of advice ... anyone... Thank You in advance.