Tub gurnard. Gurnards are strange-looking, bottom-feeding fish which use the three bottom rays of their pectoral fins to "feel" the sea bed. They have firm-textured white meat with not much flavour. They are rich in protein, iodine and phosphorus. The tub gurnard is a large brownish-orange variety with bright orange pectoral fins and is the one most readily available in the United Kingdom. They are all very bony fish. Small ones are excellent in soup. Red or grey mullet (US: striped mullet) can generally be substituted for it, and are usually better.

Giant puffball. An edible mushroom which slices almost like bread. Use only the smaller ones and they should be heavy and firm. If they are light in weight than they have dried up. Always cut them open from top to bottom with a sharp knife to check the interior

Acorn. The fruit of the oak tree, shaped like a tear drop. Some varieties are edible and can be ground to use as a coffee substitute or mixed with flour and used in bread. On the label of Ibérico ham, this indicates that the diet of the pig was exclusively acorns for the last three months of its life.