Number of monsters ??

Hello, i would like to buy eggs but it says that i don't have enough room for another monster.
What is the max number of monster i can have ? I'm sacrifying lot of them but it doesn't change anything...

pretty sure its around 250, but im not intirely sure, theres somewhere you can see it but i dont remember where >.<

I had 200 and it said i have too many monsters. I think at 190 monsters i could catc new monsters.

When u reach 200 u can't seal but still u can breed to get more from egg n breed until 300