Choking? White face turning purple-blue

[kim]

Can they choke? Sushi's face turned a purply-blue colour when i fed her some shrimp and her gills also went that colour...? She spat them out and now keeps 'yawning'

 

[kim]

ok shes just regergitated 2 shrimps by 'coughing' them up and now shes a bright pink colour..

 

[stipe]

Mine does that two. He would get some, spit ot out and act liek his chokeing and keeps yawning. I thinks its liek us shoving fingers down our throat which makes us vomit. I might be wrong.