# is there a substance that you CAN'T see through?

**URL:** <https://boards.straightdope.com/t/is-there-a-substance-that-you-cant-see-through/137149>\
**Category:** Factual Questions\
**Created:** [November 17, 2002, 8:57am UTC](https://boards.straightdope.com/t/is-there-a-substance-that-you-cant-see-through/137149 "2002-11-17T08:57:12Z")\
**Posts on this page:** 1\
**Page:** 2

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**Author:** ![Mangetout](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/mangetout/32/19_2.png) [@Mangetout](https://boards.straightdope.com/u/Mangetout)\
**Post date:** [November 18, 2002, 12:20pm UTC](https://boards.straightdope.com/t/is-there-a-substance-that-you-cant-see-through/137149/21 "2002-11-18T12:20:21Z")

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> [@](#):
>
> \*Originally posted by Hari Seldon \*  
> **Somehow this reminds me of the time I was in a Japanese restaurant and saw (and ate) some tiny fish that were totally transparent and virtually invisible–except for their eyes.**

Are you absolutely sure they actually gave you the fish? I mean they could save loads of money by just giving you the two eyes on a plate and _telling you_ it’s a transparent fish.

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