Cortland 50+ Series – Billfish Sinking Head Fly Line
Deliver large flies through turbulent prop wash.
A 30-foot Type 6 sinking head, hi-vis orange tip, and 50-pound-plus core provide tracking, control, and stopping power for billfish.
The 50+ Series Billfish is designed to deliver large flies into the middle of the water column when teasing billfish. A 30-foot Type 6 sinking head cuts through turbulent prop wash, while the 18-inch hi-vis orange tip helps you track the line and fly. Grip Set Technology provides exceptional feel and consistent hook sets when targeting large gamefish with hard mouths.
| Water Type | Saline |
|---|---|
| Density | Sink Head (6 IPS) / Floating Running Line |
FAQ
What makes the 50+ Series Billfish line suitable for targeting billfish?
The 30-foot Type 6 sinking head and 50-pound-plus core provide strong tracking and stopping power in turbulent conditions. The hi-vis orange tip improves visibility, and Grip Set Technology ensures consistent hook sets when fishing with large gamefish.
Is this line suitable for use in saltwater environments?
Yes, this line is specifically designed for saltwater use and is built to withstand marine conditions.
What is the length of the sinking head and the tip?
The sinking head is 30 feet long, and the tip is 18 inches.


Lucas Dowd –
This line performs well in rough conditions. The orange tip is easy to see in the water, and the sinking head keeps the fly in the right depth. I’ve used it on multiple trips and it consistently sets the hook when targeting billfish.
Jack Edmunds –
Good for deep water fishing. The grip technology helps with feel and control. A bit heavy for light conditions, but perfect for targeting larger fish in saltwater.
Irene Hill –
Excellent performance in prop wash. The line stays stable and the tip is very visible. I appreciate the durability and the consistent hook sets when fighting big fish.