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Trout vision and refraction

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In this third installment of The Underwater World of Trout, we explore why what you see isnt what the trout sees. More importantly, youll learn to interpret what you actually see to better understand what really is happening under the water.

Since you got this far …


The GFF money box

… I have a small favor to ask.

Long story short

Support the Global FlyFisher through several different channels, including PayPal.

Long story longer

The Global FlyFisher has been online since the mid-90's and has been free to access for everybody since day one – and will stay free for as long as I run it.
But that doesn't mean that it's free to run.
It costs money to drive a large site like this.
See more details about what you can do to help in this blog post.

The Global FlyFisher was updated to a new publishing system early March 2025, and there may still be a few glitches while the last bits get fixed. If you meet anything that doesn't work, please let me know.
Martin - martin@globalflyfisher.com