A small fishing net is used to catch fish such as shrimps, anchovies, karambwanji, minnows, and monkfish. Nets can be purchased from various fishing shops for 5 coins. It can also be obtained for free from either the Fishing tutor south of Lumbridge near the coast east of the swamp, or from the Spirit Angler at the Ruins of Unkah.
Fishing - OSRS Wiki
Free transparent fish png images, page 64
Small cast net, RuneScape Wiki
Free transparent net png images, page 13
Black Fishnet Gloves - Manusi Plasa Fara Degete Png,Fishnet
Free transparent fishnet png images, page 2
Tiny net, RuneScape Wiki
Suggestion] Add an equippable small net to the Aerial Fishing Shop
Free transparent fishnet png images, page 2
Free transparent net png images, page 13
Butterfly net - OSRS Wiki
Fishing spot (minnow) - OSRS Wiki
Fishing spot (Civitas illa Fortis) - OSRS Wiki