▁d ors al ▁fin ▁is ▁relatively ▁shorter ▁than ▁the ▁ju ven ile ' s ▁fin , ▁but ▁they ▁all ▁res emble ▁yellow ▁and ▁orange ▁dead ▁tree ▁leaves . ▁ ▁See ▁also ▁List ▁of ▁fish ▁families ▁ ▁References ▁▁▁ ▁Category : R ay - f inned ▁fish ▁families <0x0A> </s> ▁S la very ▁in ▁Spain ▁can ▁be ▁trac ed ▁to ▁the ▁times ▁of ▁the ▁Gree ks , ▁Pho en icians ▁and ▁Rom ans . ▁In ▁the ▁ 9 th ▁century ▁the ▁Muslim ▁Mo or ish ▁r ul ers ▁and ▁local ▁Jewish ▁mer ch ants ▁trad ed ▁in ▁Spanish ▁and ▁Eastern ▁European ▁Christian ▁slaves . ▁Spain ▁began ▁to ▁trade ▁slaves ▁in ▁the ▁ 1 5 th ▁century ▁and ▁this ▁trade ▁reached ▁its ▁peak ▁in ▁the ▁ 1 6 th ▁century . ▁The ▁history ▁of ▁Spanish ▁ens lav ement ▁of ▁Afr icans ▁began ▁with ▁Portuguese ▁capt ains ▁[[ Ant ão ▁ irst ▁large ▁group ▁of ▁African ▁slaves , ▁made ▁up ▁of ▁ 2 3 5 ▁slaves , ▁came ▁with ▁Lan ç ar ote ▁de ▁Fre itas ▁three ▁years ▁later . ▁In ▁ 1 4 6 2 , ▁Portuguese ▁slave ▁trad ers ▁began ▁to ▁operate ▁in ▁Se ville , ▁Spain . ▁During ▁the ▁ 1 4 7 0 s , ▁Spanish ▁mer ch ants ▁began ▁to ▁trade ▁large ▁numbers ▁of ▁slaves . ▁S la ves ▁were ▁au ction ed ▁at ▁market ▁at ▁a ▁C athedral , ▁and ▁subsequently ▁were ▁transport ed ▁to ▁cities ▁all ▁over ▁Imperial ▁Spain . ▁This ▁led ▁to ▁the ▁spread ▁of ▁Mo or ish