Lost my favorite fish

I have a para oxy velvet damsel(4") that I've had for over four years and he stopped eating for two days.
This is by far the toughest fish I've ever had,including triggers,and I can't believe I found him upside down passed away.
He made it through a tank crash and a heater electrocution.
He is in with a 3" spotted hawk and a 16" snowflake.
I am wondering if the hawk or the eel killed him.
The hawk has spines missing on two of his dorsal fins.
Water levels are better than fine.
Any knowledgable replies welcome.
Triggerman

Dangerdoll said:

No knowledgable reply, Trigger but just wanted to say that I'm sorry you lost your favorite fish.... I know how tough that must be...... hopes ya get some answers....

Click to expand...

Thanks very much DD.I really appreciate that.
That tank seems so empty and it hit me pretty hard.
Zeus was a very,very cool animal.
He quit bullying the hawk about three weeks ago which makes me very suspicious.
The Hawk is about as tough as customer as you can get.
Triggerman