Patterned Shell Fragment

Vendor

Base value 4s 10c (carries a vendor price; bought or sold as a reagent).

Crafting

Not craftable.

Gathering

Not a gathered material.

Dropped by

Red Crayfish	level 18
Giant Red-Shelled Crab	level 19
Blackrock Wereshark Swordsman	level 18
Blackrock Wereshark Javelineer	level 18
Blackrock Wereshark Warrior	level 18

Note: the monster level tells you the zone tier where it is found; exact spawn coordinates are not published in the game data. See the World Atlas for zone level bands and Dungeons & Raids for instanced drops.