Involved in the degradation of L-fucose and D-arabinose. Catalyzes the reversible cleavage of L-fuculose 1-phosphate (Fuc1P) to yield dihydroxyacetone phosphate (DHAP) and L-lactaldehyde. L-fuculose 1-phosphate = (S)-lactaldehyde + dihydroxyacetone phosphate Binds 1 zinc ion per subunit. Carbohydrate degradation; L-fucose degradation; L-lactaldehyde and glycerone phosphate from L-fucose: step 3/3. Homotetramer. Belongs to the aldolase class II family. AraD/FucA subfamily.