bristlenose pleco acting weird

I've noticed for about a week now that my bristlenose is acting very lethargic. Even when i put my hand in to remove uneaten veggies or plant matter he doesn't even swim away, it's like he is very used to my touch. I also notice him just sitting in one spot for hours at a time. Before he would be very active. I know my water parameters are fine too.

This morning I found him dead this is so weird...He was acting fine a week ago.

Sorry for all these posts everyone. This is so weird, after finding my bristlenose pleco dead, a few hours later I found one of my neons dead! with a big chunk missing out of him! I only have zebras, mollies, neons, and used to have a pleco...I'm about to do a 50% water change right now...

Zebra Danios can be fin nippers, especially when they're not in a large group. If there is no fungus outbreak in the aquarium, the zebras are probably to blame for the loss.

I have 8 zebra danios...I really hope everything works out.

Me too.