Royal clown knife mouth size?

[Omrit]

I have never seen a RCK above 20 inches in captivity so assuming that is about the size they are likely to stay around what can one that size swallow?

How many inches does a standard shape cichlid (like a firemouth) need to be for it to be 100% safe with it?

Not finding much data on the RCK or the regular clown knife other than "mouth is bigger than it seems".

 

[tlindsey]

How many inches does a standard shape cichlid (like a firemouth) need to be for it to be 100% safe with it?

Have you ever seen your clown knife yawn?
Your firemouth would have to be very large over 5 inches.

 

[Omrit]

Have you ever seen your clown knife yawn?
Your firemouth would have to be very large over 5 inches.

I don't have the knife yet nor do I have any firemouths it's just the most cichlid shaped cichlid I could think of. I think I want a RCK eventually, but I wanted to plan ahead with tank mates.

So a standard shaped fish over 5 inches is safe with all but the largest RCK correct?

 

[tlindsey]

So a standard shaped fish over 5 inches is safe with all but the largest RCK correct?

Yes