The Dunn's fish, a large paleontologist that lived during the Paleozoic Devonian period (about 360 million to 430 million years ago) and was about 11 meters long, was the top predator at the time.
Hornstone, an extinct cephalopod, lived in the Devonian period. From the fossil remains of the horn stone, it can be judged that its body length reaches 9 meters.
Long's shrimp, 2-3 m long, lived in the Cambrian period.
The wing-limbed horseshoe crab (hòu), 3–4 m long, lived in the Silurian period.
The broad-winged horseshoe crab, 2–3 meters long, lived in the Ordovician period (460-445 million years ago), often hiding in sediment on the ocean floor and hunting for food in the form of ambushes.
Horned helmet crayfish, lived between 540 million and 500 million years ago.
The giant hunting fish, 5–6 m long, lived during the Devonian period (about 360 million to 415 million years ago).
It is a salamander with a body length of about 60 cm and lived in the Permian.
The odd shrimp, about 2 meters long, lived in the Cambrian period.
Finned anchovy, body length of about 4 meters.