How to obtain Fishing Grubs
Fishing Grubs are one of the most commonly Foraged items in the game. You can Forage them up from basically any zone that you visit and this is the #1 way for you to obtain the item. If you can't Forage yourself ask another player to Parcel or give you some of these instead... They're practically dust bunnies to people, they'll be happy to give them away I would assume.
Those of you too impatient to Forage them and unable to find a player to sell you some have a few different options... All of these options happen to be in Freeport or in Plane of Knowledge and each of these NPCs is likely locked behind an expansion pack.
Rataga Stoneskipper - Plane of Tranquility
Rataga is found in Plane of Tranquility nearby the zone in for Plane of Nightmare. This is the easiest NPC to access for Fishing Grubs once PoP goes live on your server. Otherwise you'll need to visit the NPCs in East Freeport mentioned further down the page.
Caden Zharik - Plane of Knowledge (VoA Expansion required)
This NPC can be found nearby the Small Bank in Plane of Knowledge once the Veils of Alaris expansion goes live on your server. He doesn't sell much but one of the items he does sell is Fishing Grubs.
Eroncil Rellyus, Farista Eniatia - East Freeport (Luclin Expansion?)