[5] Eledone massyae feeds mostly on macro crustaceans such as crabs from the family Portunidae as well as polychaetes and mullusks.

[5] Eledone massyae is found seasonally along the continental shelf of Rio de Janeiro.

Its distribution ranges from Rio de Janeiro to the Peninsula Valdez in Argentina.

[5] It lives in sandy and muddy areas of the middle and outer continental shelf of the southwestern Atlantic Ocean between 30° and 34°S, mainly in waters off Argentina and southern Brazil.

During spring and summer, it is found in cold waters of maximum 18 degrees Celsius and around 60 meters deep.

In males, the process of sexual maturation is complex and begins early in the individual's life.