Scientific Anglers Sonar Striper Intermediate WF-10-I – Blue Storm Gray Fly Line

Subsurface control for striped bass in clear water

The Scientific Anglers Sonar Striper Intermediate delivers a true intermediate sink rate, helping flies stay just beneath the surface where spooky striped bass in clear water often strike with a measured, sub-surface movement. The result is a more controlled presentation that reduces surface splash and keeps the line action visible to the angler.

Designed for big patterns, with field-ready durability

Built with a strong taper, this line turns over heavy streamers and weighted flies with ease, even when wind and current complicate the cast. The model is crafted to stand up to saltwater use while maintaining slick, workable handling across conditions.

Finish that balances stealth and visibility

The Blue/Storm Gray finish offers stealth for the fish while keeping the line visible enough for you to track line position and timing on bright days. This balance helps you stay confident during long casts or early morning sessions.

Key specs and practical benefits

• Intermediate sink rate for subsurface control
• Made for targeting striped bass
• Sizes: WF-7-I to WF-10-I
• Turns over heavy streamers and big patterns
• Blue/Storm Gray finish balances stealth and visibility

What to expect in real-world use

Anglers report dependable performance in windy conditions and flowing water, with the ability to cast larger flies without sacrificing line control. The line’s saltwater-capable construction adds confidence when fishing near structures or in brackish inlets.

• Subsurface presentation with low surface disruption
• Smooth turnover of weighted flies and streamers
• Durable build for saltwater environments
• Clear-water stealth paired with angler visibility