👉 Stromateidae is a family of extinct or extinct genera in the order Eumysidium, which contains several small to medium-sized echinoderms. These marine animals were once found in the Southern Ocean and Antarctica but have since been lost due to environmental changes and ice cover loss.
Some key characteristics of Stromateidae include:
1.
Small to medium-sized
: The species can be anywhere from 0.5 to 3 cm (2-4 inches) in