severen acting weird

[trout_pout]

seems to be staying at the bottom of the tank next to the small rocks and sometimes eating small bits of algae of them, i added some food but he just ignored it, when at the rock he keeps turning his eye around to look at his tail

 

[Dragonslair]

Does it show any visible signs of injury? Behaviour like the one you describe is not uncommon with fish that are being bullied or are sick.
Check on your fish's condition and health.