What this dashboard light means ?

[x509]

I saw following light on on my dashboard today and I couldn't find a reference in the manual. Can someone explain what is this for ?

http://imgur.com/a/GUkk4

(sorry couldn't upload ass attachment, the file limit is too small)

[atj8]

low coolant. looks like yours different from Merica's

[aligater]

That's the low tide indicator, curious what merica has now.