More information, this is from WLAP:
The "ditch eels" are lamprey, and are likely ammocoetes, which is the juvenile phase. However, sturgeon anglers also use adult lamprey. We have three different lamprey species that potentially inhabit the lower Fraser River, including river lamprey (Lampetra ayresi), Pacific lamprey (Entosphenus tridentatus) and western brook lamprey (Lampetra richardsoni). Pacific and Western Brook are the more common. River and Pacific lamprey are anadromous and parasitic as adults, while western brook lamprey rear, mature and spawn in freshwater and are non-parasitic. Lamprey are a finfish, and as such the capture of lamprey is subject to the BC Sport Fishing Regulations. They must be captured by angling while in the possession of a current non-tidal license; they must be used only dead for bait; they must not be transported live, and they must not be bartered with or sold. There is presently no limit on the capture of any of the above three species for personal use.