What characteristics are common to fish?
1. All fish are cold-blooded 2. Fins are common to all fish and help propel them through water 3. All fish have a swim bladder which allows them to maintain oxygen levels whilst they sleep 4. All fish have gills which help them breathe 5. Fish can sense nearby movements using a lateral line present under their scales. You may find this resource helpful: https://sciencing.com/5-characteristics-fish-common-12059701.html
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