How placoderms feed?

Placoderms, an extinct group of armored fish, primarily fed using a combination of biting and suction. They had robust jaws equipped with sharp, bony plates instead of teeth, which allowed them to grasp and crush their prey. Some species may have also employed suction feeding by rapidly expanding their mouths to draw in smaller prey. Their feeding strategies varied depending on their size and ecological niche, allowing them to exploit a range of food sources in their aquatic environments.