If fishing’s your thing, you can get a small taste of the virtual version at Lake View Waters Fishing World. It’s owned by Australian SL resident Stephen Carpenter.
To fish you just need to pay L$1 to buy a fishing rod and then L$2 for each fishing attempt. Each ‘fish’ you catch is an object or money prize. I had two attempts and got a gun on one of them. It’s more a lucky dip than fishing simulator and would work better over a larger area, but it’s a different activity all the same.