Mark and Derek Anaconda

Mark Anaconda and Derek Anaconda are the teenage brothers of the titular character of Angela Anaconda.

Open All Night
In the Season 3 episode Open All Night, a burst water main lands the Anaconda family in a tent in the backyard for the night. Mark and Derek’s sock-wearing feet are seen on either side of Angela’s head. It can be assumed that Derek is wearing the white socks with blue toes and heels, because, when Angela pushes them to one side, a whimper in his voice can be heard when he puts his left foot on top of his right one to comfort himself. This would mean Mark is wearing the white socks with green toes and heels.

The scene opens with Angela in the tent and Mark and Derek's sock-wearing feet on either side of her head. Derek's socks inch towards her and she angrily pushes them away. Derek whimpers and puts his right foot on top of his left one to comfort himself. Mark then sticks his sock in Angela's ear, to which she responds, "Hey... ow! Get your grubby tube sock out of my ear!" and sticks out her tongue to show disgust. Derek then puts his sock to Angela again and makes a sound somewhere between a giggle and a grunt.

Enter the Angela
A the start of this episode, Mark and Derek both try to make Angela smell Derek's sock, which is white with an orange toe and heel, and has a three-striped rim - orange on the top and bottom and green in the middle.