The seal pup who was found in the city of New Haven, Connecticut in mid-February has died — but his legacy is far from being over. The Mystic Aquarium, who took care of the baby seal named Chappy since he was admitted to their rescue clinic on Feb.

An aquarium was treating the seal pup for dehydration, malnutrition and other health issues before its condition declined past the point of no return.

According to the aquarium, the gray seal pup found and rescued in New Haven died from gastrointestinal issues that "were too severe to treat."