In the Japanese release, Seel's weight is incorrectly stated as 19.0 kg, instead of the correct 90.0 kg. The same error occurs on the English print as Seel's weight is incorrectly stated as 41.9 lbs, instead of the correct 198.4 lbs.
This card's Weakness is printed as Metal, the TCG equivalent to the Steel type. Seel, as a pure Water type, is actually resistant to Steel-type attacks. It's possible that the card's creator may have mistaken Seel as being dual-type Water/Ice like its evolution.