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1. Stingray does not have a swim bladder
2. Sea Robin does not have a stinger.
3. Stingrays don't have a operculum
4.  Sea Robin does not have spiracles.

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1. Both have a caudal fin.
2. Both have dorsal fins.
3.  Both have teeth
4. Both have pectoral fin.

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The caudal fin is the biggest fin on the fish. It's used for forward motion and acceleration.

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The nostrils are not used in respiration, they lead to olfactory sacks.

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This fish does not have eye lids to protect it's eyes. It used to hunt prey and guided it through the water.

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The intestine is the long stringy thing under the swim bladder it absorbs digested food from the stomach.

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It's got the regular muscular pattern of a sea robin shown here by Antonio.

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The swim bladder is important to the fish because it controls it's bouyancy.