Rio DeepSea 400gr 7.7ips Fly Line

The Rio DeepSea 400gr 7.7ips Fly Line is a specialized sinking fly line designed for deep-water saltwater fly fishing, particularly for targeting species like tuna, marlin, sailfish, and other large pelagics. Here’s a breakdown of its key features:

Specifications:
– Weight: 400 grains (designed for fast-sinking applications)
– Sink Rate: 7.7 inches per second (IPS) – one of the fastest-sinking lines available
– Core: Ultra-low stretch braided core for strength and sensitivity
– Coating: High-density tungsten-infused coating for rapid sinking
– Length: Standard 30-yard head (varies slightly by model)
– Color: Typically dark blue or black (low visibility underwater)

Best Uses:
– Deep-Water Fishing: Ideal for depths of 30+ feet, where fast-sinking lines are necessary to reach fish quickly.
– Big Game Saltwater: Designed for powerful species that stay deep, such as tuna, marlin, and swordfish.
– Fast Currents & Strong Winds: The heavy weight helps cut through wind and currents for better control.

Recommended Rod Pairing:
– Rod Weight: 12–14 weight (depending on target species)
– Action: Fast or extra-fast action for powerful casting and control.

Pros:
✔ Extremely fast sink rate – gets flies deep quickly
✔ Durable construction – built for tough saltwater conditions
✔ Low stretch core – better hook sets at depth
✔ Smooth casting for its weight class

Cons:
✖ Not versatile – strictly for deep-water applications
✖ Hard to mend/control once sunk due to extreme density
✖ Requires strong rods & anglers – not for beginners

Alternatives to Consider:
– Rio Leviathan (400gr, 6.5ips) – Slightly slower sink rate, good for intermediate depths.
– Scientific Anglers Sonar Sink 30/40 (400gr, 7.5ips) – Similar sink rate, different taper options.
– Airflo Depth Finder (400gr, 7.0ips) – More supple in cold water.

Final Verdict:
If you’re targeting deep-dwelling pelagics and need a line that sinks like a bullet, the Rio DeepSea 400gr 7.7ips is an excellent choice. However, it’s overkill for shallow or inshore fishing.

Would you like recommendations for reels or leader setups to pair with this line?