Fact 1: Adult tunicates are barrel-shaped.

Fact 2: Tunicates, or sea squirts, are marine organisms covered with a gelatinous tunic.

Given the two facts above, answer the question "what adults are barrel-shaped?" with the following options: 
- offspring
 - fertile
 - barnacles
 - Length
 - insects
 - sea squirts
 - humans
 - beer


 

      sea squirts   