I have a feeling that 'Sealia' is possibly 'Celia' a pup born to 'Pru' at the Welsh Mountain Zoo in around 1981. Have to have a look for dates as the paper I wrote at the time has gone off line:
Dineley, J. Sea-Lion Breeding: Second Year at the Welsh Mountain Zoo. (1982) Aquatic Mammals, Volume 8, Number 3.
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The paper can now be found here:
http://www.aquaticmammalsjournal.org/share/AquaticMammalsIssueArchives/1981/Aquatic_Mammals_8_3/Dineley.pdf