why do you need ud here?
Because "ser ud" means "looks" as in something/-one "resembles" something/-one just "ser" means "looks" as in "sees"
Almost typed "finny" :)
funny as "something to laugh at" od "something suspiciously"?
Something to laugh at.
Probably because of all the beer.
So I know that " ser ud " is used for , its appearence looks like <something> .
However, I dont quite understand why cant it be :
fisken ser ud sjov
It is because of the way you construct phrases in Danish. When you have a verb with two parts and an adjective or adverb, you put it in the middle of the verb. So, fisken ser sjov ud, and not fisken ser ud sjov.
Why wouldn't "The fish look funny" be accepted. What tells me it's singular vs. plural?
"Fisken" means "THE fish", so it has to be singular.
You can certainly have a definite plural. I'm not sure why mw1342's answer wasn't accepted.
Plural would be fiskerne
I think ud is used here to make the sentence "bestemt" it refers to fisken
The "ud" is a part of the verb. "Ser" means to look at something, "ser ud" means that somethings looks like something. In this case, the fish (Fisken) seems, or looks like, it is funny.
The fish looks fishy (aka funny/strange)
Nice try, however "sjov" covers only the "fun" meaning of "funny" and not the "fishy" one :-)