The local comercials call those long ones "Ribbon snoek" we sometimes get them in the deep when they fall out of the stern trawler's nets. The small one, looks like some sorts of anchovie.
The ribbon snoek/ frost fish are actually quite nice to eat but you need the bigger ones to get some proper meat off!
They are caught in 10's of tons at a time by stern trawlers..... i have seen a net full of 40 tons of these fish before!