Crabs Pack
https://www.unrealengine.com/marketplace/en-US/product/crabs-pack
Beetles
https://assetstore.unity.com/packages/3d/characters/animals/insects/beetles-225200
Monster&&LowPolygon Cyclops
https://assetstore.unity.com/packages/3d/characters/monster-lowpolygon-cyclops-145103
Creature 02
https://www.unrealengine.com/marketplace/en-US/product/creature