Thanks for the suggestions in the previous post, I definitely think the trident is a more suitable weapon than the stone spear I had in mind initially.
I’m pretty happy with the sea weed thong, I might vary what materials they use as I imagine they are using found materials like bits of torn up rags, kelp/sea weed and maybe old fish netting.
Next up I think I will work on Alex Garcini’ suggestion of a fish man with a big fish hook, I imagine it will have a length of rope tied to it and be used to hook victims and pull them.
As always feel free to make suggestions below for weapons, minis, scatter terrain etc.