Cleithracara maronii (stressed colouration)
A male keyhole cichlids (Cleithracara maronii) with stressed colouration, after having a pecking order dispute with another male which is currently guarding eggs. The keyhole was making a good job of blending into the Crypt. wendtii 'brown'.
C. maronii are a shy cichlid species, which is popular for planted aquaria.