1) Family fucaceae 2) Protoctist family 
Fucaceae are a family of brown algae, containing six genera: ...
Fucaceae is a family of dark-coloured algae consisting of olive-coloured inarticulate seaweeds distinguished from other algae by their reproductive organs which consist of archegonia and antheridia, contained in common chambers, united in club-shaped receptacles at the ends of the fronds.
[n] - small family of brown algae: gulfweeds
family Fucaceae noun small family of brown algae: gulfweeds; rockweeds