d rum mer ▁Francis ▁Mark ▁went ▁on ▁to ▁form ▁War ship . ▁In ▁ 2 0 0 9 , ▁after ▁the ▁departure ▁of ▁War ship ' s ▁co - found ing ▁members , ▁Mark ▁met ▁guitar ist ▁Tom ▁Tier ney ▁on ▁Craig ' s ▁List ▁and ▁h ired ▁him ▁to ▁perform ▁with ▁the ▁band ▁on ▁a ▁national ▁tour ▁supporting ▁G ob lin ▁C ock . ▁Mark ▁and ▁Tier ney ▁continued ▁playing ▁together ▁after ▁the ▁tour , ▁splitting ▁time ▁writing ▁between ▁Philadelphia ▁and ▁Brook lyn . ▁Short ly ▁there after , ▁ex - K iss ▁K iss ▁bass ist ▁Patrick ▁Southern ▁was ▁brought ▁into ▁the ▁re he ars als ▁and ▁writing ▁sessions ▁for ▁what ▁would ▁become ▁T idal ▁Ar ms . ▁ ▁Band ▁Name ▁Origin ▁When ▁two ▁galaxies ▁pass ▁by ▁each ▁other ▁in ▁close ▁proxim ity , ▁their ▁shapes ▁dist ort ▁due ▁to ▁each ▁other ' s ▁gravity . ▁The ▁outside ▁spir al ▁arms ▁s play ▁out ▁into ▁space , ▁often ▁casting ▁stars ▁and ▁dust ▁into ▁the ▁aby ss ▁as ▁their ▁host ▁galaxies ▁dr ift ▁slowly ▁back ▁towards ▁each ▁other ▁in ▁orbit . ▁These ▁spir al ▁dist ort ions ▁are ▁called ▁tid al ▁arms , ▁or ▁more ▁commonly , ▁tid al ▁t ails . ▁ ▁M embers ▁Francis ▁Mark ▁- ▁drums ▁Tom ▁Tier ney ▁- ▁guitar , ▁vocals ▁Patrick ▁Southern ▁- ▁bass ▁ ▁Disc ography ▁H air ▁and ▁Te eth / F lo oded ▁M ead ows ▁ 7 " ▁( 2 0 1 0 ) ▁The ▁Sun ▁Ex pl oding ▁( 2 0