Steve is on the right track, I`ve recently returned from the Med and had some fun with harbour mullet. Best of over 30 fish was a 7lb grey mullet, with lots over 5lb.
Method: Lite weight telescopic spining rod, 5lb main line with 6 foot long 5lb flurocarbon hook length. size 14 course hook.
Free line floating crust. No float or any other end tackle.
Had a group of locals spitting nails when they couldn`t catch. They were all fishing too heavy. The flurocarbon and tiny hook did the trick.
Ps don`t forget to,take a landing net, I lost numerous fish over 7lb when I tried to lift them up a 4 foot wall.
Godd luck.