▁the ▁Ka im ing ▁area ▁in ▁upper ▁My an mar . ▁ ▁Description ▁When ▁first ▁described , ▁Dan ion ella ▁transl uc ida ▁was ▁the ▁smallest ▁ost ari oph ys an ▁and ▁the ▁smallest ▁adult ▁verte br ate ▁to ▁inhab it ▁fresh ▁water . ▁Its ▁adult ▁size ▁ranges ▁from ▁ 1 0 – 1 2   mill imet res ▁(. 4 3 – . 4 7   in ) ▁SL . ▁D . ▁mir ifica ▁gets ▁slightly ▁larger , ▁at ▁about ▁ 1 4   mm ▁(. 5 5   in ) ▁SL , ▁but ▁is ▁still ▁one ▁of ▁the ▁smallest ▁fresh water ▁fish es . ▁ ▁Dan ion ella ▁species ▁lack ▁scales , ▁bar b els , ▁and ▁later al ▁line . ▁ ▁D . ▁mir ifica ▁has ▁a ▁single ▁row ▁of ▁mel an op hor es ▁between ▁the ▁pel vic ▁fins ▁and ▁the ▁tips ▁of ▁the ▁cle ith ra , ▁and ▁there ▁is ▁a ▁lack ▁of ▁mel an op hor es ▁on ▁the ▁unders ide ▁of ▁the ▁ab d omen . ▁ ▁D . ▁d rac ula ▁reaches ▁ 1 7   mm ▁in ▁length . ▁It ▁is ▁ne ot on ous , ▁lack ing ▁ 4 4 ▁b ones ▁that ▁develop ▁late ▁in ▁the ▁related ▁z eb raf ish ▁Dan io ▁r er io . ▁They ▁have ▁teeth ▁made ▁of ▁b one , ▁rather ▁than ▁the ▁true ▁teeth ▁of ▁other ▁fish es , ▁and ▁the ▁males ▁have ▁a ▁pair ▁of ▁b oney ▁f angs ▁which ▁the ▁use ▁for ▁sp arring