I don't get the joke, can someone explain it please? "A fish with no I's?

[Tess]

FSH?
vagina?

 

[A Scorpio Lost]

I thought it was a blind fish, but the person said no, not fish with no eyes, but fish with no "I"s

does anyone get this joke?
WHAT THE HELL IS FSH???

 

[tangaroo]

An amberjack is a kind of fish with no l is the name
(No, I don't like fishsticks)

 

[Snakegirl3434]

its like a trick / they want u to say blind fish

 

[♥ wachu lookin at ♥]

Do you like fishsticks?

 

[Trixie Delight]

Shark? Or any other kind of fish spelled without an "i"?

 

[Chelsea]

I don't get it.....maybe it's referring to the spelling.....Man, I'm completely blank