Ice flasher or underwater camera

[Bardic]

If assume they mean a history like this:

https://www.youtube.com/watch?v=nByZVT_7ixk

For me it just makes it a little clearer if a fish has come up off the bottom, or if it swam in from the side and suddenly appears. Also you can look away without missing what has gone on. May not help much, but I think it is fun and easier to show those around you.
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