Page 454 - Bob Holtzman "The Field Guide to Knots How to Identify, Tie, and Untie Over 80 Essential Knots for Outdoor Pursuits"

57. Blood Knot

Also known as: Barrel Knot, Blood Knot with Inward Coil

This is a very popular fishing knot, but it works well in heavier stuff too. It
snugs up so tight that it’s quite difficult, if not impossible, to untie.

Uses: joining ends of rope of any weight, especially monofilament

Pros: very secure; simple in concept
Cons: difficult to manipulate; very difficult to untie under load

Instructions

1. With the ropes facing opposite directions, overlap their working ends. Make a crossing turn in one
working end around the standing part of the other rope.

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