Engineer goby health and lifespan

[Zoa_Fanatic]

So I have a biocube 32 led with all stock equipment and the following parameters:

ammonia-0 ppm
Nitrite-0ppm
Nitrate - 15 ppm
pH-8.0/8.2 (kinda colorblind so cant tell)

so I’ve got a massive, and I mean massive, engineer goby named kashima (18-20” long). He’s going on 7/8 years old (my dad got him as a juvenile but we argue about when). His only other tank mate is a four stripe damsel about an inch ling whose lives with him for about 4 years now. I recently moved tanks and now I see him a lot more. He looks a little skinnier than before but not much and he eats like he’s never had food before. How can I tell if his health is deteriorating or if he is being bullied? I don’t think he would be since they’ve lived together so long and he’s a monster.

 

[Big G]

Can you post a picture of the "monster"? I've just got to see this thing.

 

[Zoa_Fanatic]

This video was three years ago. He’s about twice to three times this size now. I can’t get a full picture of him without tearing my aqua scape apart now. Sorry for the long delay in the reply.

 

[Zoa_Fanatic]

Can you post a picture of the "monster"? I've just got to see this thing.

Sorry for the delay. This is him a few years ago. The photo says last year but I’m pretty sure it was way before then I haven’t had that tank in a while. He’s twice this now. I can’t get a full photo of him without tearing my rock scape down now. He’s a turd. You think he could be bullied?