Since 'Tailor' was a skilled profession he had to have been a tailor in 1891. Found this:
1891 Census - 7 Sedan Street, St. Peter, Ipswich, Suffolk
Frank Marria Boarder Single 30 Tailor b. Jersey
(Ref.RG12 - 1467 - 123 - 21).
The name Marais appears on Channel Island Census' and origin seems to be France.
Cannot find anything in 1881 (here or on Channel Islands) but did find in 1871:
1871 Census - 35 Mary Bandains, St. Helier, Jersey.
Margaret Maris Head Wid. 40 Nurse b. Jersey
Francis Maris Son 12 App. Tailor b. Jersey
Annette