To say "The Sharks" you will have to say des because there is more than one and requins because of "Sharks". So You will say "Des Requins"
A Caribbean shark is 'un requin des Caraïbes' in French.
un requin mégalodon
a shark is called 'un requin' (masc.) in French.
le requin
im going to say shark
un requin
Un REQUIN
a shark
Shark = Haifisch in German
A fin (like a shark fin) is 'un aileron' in French.
In Portuguese, "shark" is said as "tubarão".
Since the megalodon is extinct and the whale Shark isn't I'd say no.