Sucking cat fish and Guppies

[Tims clown]

Hi have 12 male Guppies and 2 cat sucking cat fish that have grown to almost 8-10cm and I think that thay are attacking the Guppies at night and eating there tails.
Is this possibly what is happening as all the tails on the guppies look like thay have been eaten.
other then fish mentioned there is also
2x Bristlenose
2x Bumblebee Gobies
1x clown louche
1x neon

 

[itiwhetu]

Bumblebee gobies are nasty little buggers. I would never keep them with anything but themselves.

 

[Essjay]

What species do you mean by sucking catfish? if it's this fish https://www.seriouslyfish.com/species/gyrinocheilus-aymonieri/ it is well known for sucking the slime coat off other fish as it matures. It is not a good fish fro a community tank.
If it's not this fish, could you post a photo so we can ID it, please.

 

[WhistlingBadger]

Yeah, if you're talking about sucking loach/chinese algae eater, get rid of them. They are nasty. The gobies are another possibility too. How big is your tank?