A pajama cardinal fish swims in a blue-lit aquarium tank.
A very close view of a pajama cardinal fish is seen in a blue-lit aquarium tank. The fish faces down to the left as it is seen from the side. The cardinal fish has large brown and black eyes with a brown face, and the scales are a silver and brown color. It has a dark vertical stripe behind its head from the top fin to the bottom fin, which are both dark brown. It has a top and bottom back fin that are larger and clear, along with the tail. The back half of the fish is silver with brown dots. The background of the image shows white and black spots, like coral or sand.