Camarina is the Shrimp Princess. While she loves to play with her little friends, she also loves to play with the Clownfish Princesses, Juli and Jessi, in the Anemone Kingdom. She can summon and command groups of shrimps with a high-pitched call.
In Size Matters, Camarina takes the girls to where some shrimps saw a "monster" which was "shiny with a huge bright eye", which is actually a Drylander vessel. When the submarine heads towards the school, Tubarina is confident that the special paint the Starfish King invented will render it invisible to outsiders, but Polvina and Ester show her and the shrimps that the paint wasn't put on properly and that they will have to repaint it immediately. Later, when they run out of paint and the special sand required for the paint to work just as the Drylanders are getting closer to the school, Camarina has a group of shrimps find the sand and another group blocking the Drylanders' view (after Leia and her whales fail to catch their attention). Sure enough, the shrimps find the sand and Camarina has her friends take the sand to the school "a grain at a time". Camarina also has her shrimps summon Leia and the others back to the school, with a large group of shrimp seemingly carrying eight of them there as well. The school is successfully repainted just as the vessel approaches; Camarina calls her friends off and the paint proves effective when the light from the vessel reflects off of the school, rendering it invisible to them.