Shilo village fishing is quite easy for low levels. Monkfish and rocktails work fine though, and they bring in some nice cash too! We think the fastest to 99 is monkfish. If you feel like getting some Runescape Gold though, fish sharks.
The quickest xp is barbarian fishing, 2nd is shilo in Runescape. If you want xp and cash go for rocktails in living caverns. Sharks are roughly 15k xp an hour. Monks 30-35k xp an hour. Rocktails 45k xp an hour. Shilo 50k xp an hour. Barbarian 55-60k xp an hour. These are all with 90+ fishing, friend with 98 telling ours this as we type.
Monkfish are definitely not faster than those two. We believe Barbarian fishing Leaping Salmon or Sturgeon is the fastest experience, though the fish are a pain to get rid of. Rocktails and fly-flishing at
Fishing at shilo village and banking the fish is the fastest fishing exp. We did this but regret it, because doing monks is slower (Not but no much) but you make WAY more money, we advise you to fish monkfish. We have many professional runescape money guys; please make order when you have not enough time to level up.