Effective Lure for Siakap

We just had an outing to a fishing pond with lots of Siakap in it with sizes ranging from 600gm to a kilo. Very good fight on ultralight line. This lure in particular was super effective resulting in 50 hook ups and 30 landed and released. It's basically a weighted jig head with a soft plastic octopus on a barbless hook. Cast it and allow it to sink to the bottom, then retrieve it at a medium speed...wham!