Items, NPCs, quests, objects and spells of patch 1.12.1, read live from the realm itself.

Shellfish

NPC Level Zone Chance

Drysnap Crawler 33 - 34 Desolace 1.68%

Drysnap Pincer 34 - 35 Desolace 1.46%
Quest Level Side

Fish in a Bucket 25 Both
Object Zone Chance

Shellfish Trap Desolace 84.9%

NPC	Level	Zone	Chance
Drysnap Crawler	33 - 34	Desolace	1.68%
Drysnap Pincer	34 - 35	Desolace	1.46%