Answer : A Gazelle is lighter than a Porpoise
The average weight of a Gazelle is 35 kg, (77 lbs) and the average weight of a Porpoise is 53 kg, (117 lbs)
 
| Name | Name:Gazelle | Name:Porpoise | 
| Weight | Weight:35 kg, (77 lbs) | Weight:53 kg, (117 lbs) | 
|  | * ranges from 12 to 75kg | * Harbor Porpoise - ranges from 45 to 60kg | 
| Height | Height:85 cm, (2 ft, 9.5 in ) | Height:n/a | 
| Top Speed | Top Speed:48 kph, (30 mph) | Top Speed:23 kph, (14 mph) | 
| Lifespan in Wild (years) | Lifespan in Wild (years):11 | Lifespan in Wild (years):15 | 
| Description | Description:Gazelles are fast, slim, and graceful animals, similar to antelope. They have very long pointed horns which stretch straight up, curving back, and appear to be striped. | Description:Harbor Porpoise are among the smallest cetaceans in the ocean. It has small flippers and lives inshore, so is the best-studied of the cetaceans. Their loud puffing sounds make them easy to find. | 
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