1) Chordate family 2) Family doliolidae 3) Oceanic tunicates 
Doliolidae is a family of tunicates in the order Doliolida. Members of the family are pelagic and often found far away from coastlines. Members of the family are transparent, gelatinous, barrel-shaped or cylindrical marine organisms. They are mostly small and inconspicuous. They have cilia which move water through the mucus nets which they use to ...
[n] - oceanic tunicates
family Doliolidae noun oceanic tunicates