Eospinus ("dawn spine") is an extinct genus of bizarre marine tetraodontiform fish from the Eocene.

The species name honors paleoichthyologist Pavel G. Daniltshenko (also Danilchenko), who described numerous fossil fish from Russia and neighboring countries.

[3] In 2002, and confirmed again in 2003, Santini and Tyler erected the family Bolcabalistidae to contain both Eospinus and the genus Bolcabalistes from Monte Bolca as close relatives of both triggerfishes and boxfishes.

[5] The similar Moclaybalistes of Ypresian Denmark was originally also placed in Bolcabalistidae, too, in 2002, but then move it into its own monotypic family of Moclaybalistidae.

Its morphology suggests a slow-moving benthic lifestyle likely associated with reefs, as with many modern tetraodontiforms.