Shellfish is a Legends of Idleon monster: 8 drops.

Shellfish | Idleon Toolbox

Shellfish

Shellfish_Card

Paper_Boat

Increases your Total Defence by 30%. Golden foods are never consumed

Golden_Meat_Pie

Hold down on this item to turn 10 Fragments into 1 Talent Point Reset Potion. You'll need 1 open inventory space for this to work.

Talent_Point_Reset_Fragment

Hold down to add a Silver Pen to your Post-Office! You can use it to skip a Delivery!

Silver_Pen

Bugsack_Stamp

Drag onto any Equip to apply. Success Chance; 100% Uses up 1 slots only if Successful. WARNING:Mystery Stat has a chance to be Negative, and reduce stats!

	Name	Qty	Rate	Chance
Base drops
	Shellfish Card
Rare Drop table rolls 1 in 83DropTable9
	Bugsack Stamp		1 in 83,300	0.00120%
	Paper Boat		1 in 833,000	0.000120%
Mega-Rare table rolls 1 in 13,900SuperDropTable2
	Mystery Upgrade Stone I	3	1 in 19,800	0.00504%
	Golden Meat Pie		1 in 27,800	0.00360%
	Talent Point Reset Fragment		1 in 92,600	0.00108%
	Silver Pen		1 in 154,000	0.000648%
	Lucky Lad		1 in 46,300,000	0.00000216%

Wiki

Shellfish

Drops