Sims 3 Fishing
Sims are able to fish around town in ponds, rivers, oceans, lakes, and even the pool (though not really a good option for catching fish). Fish that are caught are able to be placed in the aquarium.
The types of fish able to be caught include: Anchovy, Minnow, Goldfish, Alley Catfish, Jellyfish, Rainbow Trout, Red Herring, Tuna, Siamese Catfish, Tragic Clownfish, Blowfish, Piranha, Black Goldfish, Salmon, Swordfish, Shark, Angelfish, Vampire Fish, Robot Fish, Lobster, Deathfish, Frog, Doitsu Koi, Kawarimono Koi, Snails, Crocodile, Ochiba Koi, Crawfish, Tancho Koi, Mummy Fish, Dragon Fish, Kissing Gourami, Sea Sludge, Sewer Trilobite.
Fish are able to be named. Once they are added to an aquarium, your Sim needs to feed them once a day or they will die. Sims also need to clean their tank, and if one dies, scoop the dead fish out.