We know Thesi since December 2008 when she had her first pup at Helgoland. She is one of those mother animals, that like to go for a swim now and then, leaving their pups back at the beach for a short time. after a bath most times, the animalse get covered in sand, which makes identification via Photo-ID impossible. Thus we assume, Thesi has already had more than the three pups we certainly know about, but was just not identified.
| Name: | Thesi |
| ID: | 327 |
| Flipper-tag: | |
| Sex: | female |
| First record: | 18.12.2008 |
| Last record: | 08.12.2011 |
| Miscancellous: |