If the email was deleted, the developers provide a dedicated tool to recover lost keys:
If you no longer have access to your original email address, you will need to contact Spiral Graphics customer support directly. Provide them with as much verifying information as possible, including: Your full name at the time of purchase. Approximate date of purchase. The old email address used. Dream Aquarium Serial Number
If a single serial number is leaked online and used by hundreds of different computers, the developer's server flags the key as compromised. If the email was deleted, the developers provide
Once you have your legitimate serial number, activating Dream Aquarium is straightforward: The old email address used
A Sperm Whale glided past the glass, its skin rendered in such high definition it looked like scarred marble. It moved with a slow, geological grace. This wasn't a programmed animation loop; the whale acknowledged him. It turned a massive eye, clouded with age and cataracts, toward the cursor.