The earth-bound nature of much ecological thinking presents challenges for posthuman life writing in the Anthropocene: underwater subjects exist in a different element, with less knowability. Sea squirts have a cultural history featuring human-centred language; as pest, food and pharmacopeia, they are exploited for human ends. But using underwater life narrative and photography to explore conventions of looking creates different possibilities for relationships between humans and sea squirts. Aesthetic categories like wobble, swerve and atmosphere can make marine lives, even small ones, significant on their own terms and enable more attention and sentient care from humans. Combining ecopoetics and self-aware life writing can bring sentience to, for and from sea squirts—and the oceans.