Zack Snyder sort of [*intervened* in a radio show](http://io9.com/zack-snyder-calls-into-local-radio-show-to-defend-the-h-1618361564) stating the following:

> 
> [...] The cool thing is, with Aquaman his trident (people don't realize this) that could cut the flesh of Superman, if they come in contact. That's a thing that's in the canon. He's super strong. [...]
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> 
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Is this true? And if so, how come?