At least make sure the thing you post is correct for something like this, as it can be important.

The first one (exclamation mark) means it is a irritant and the second one means it is hazardous to the environment (not just aquatic)

I think, that's not a coral, but rather a dead tree next to a stream...

The third one is "no GHS symbol", GHS being the Globally Harmonized System of Classification and Labelling of Chemicals.

Coral? I always assumed that was a tree and it means "hazardous to the environment"

To translate the sibling, the third one is where it would tell you how dangerous the substance is for you. But it's keeping its secrets.

Cool. I learned something. Thanks!