Larin (plural: lari) is the name of a class of objects serving as coins in areas around the Arabian Sea.
The Larin, also known as "Koku Ridi" (Silver Hook) was in use in the Kandyan Kingdom from 17th to early part of the 19th century in Sri Lanka and were made by private parties, five of which went to a piece-of-eight, or a Spanish Dollar.
These coins with a shape like a fish-hook, bear no legend, or at best poor imitations of Arabic letters; they are usually somewhat thick and short, frequently shows one or more cuts at the bend, apparently made to test the purity of the metal.
The silver larin coinage, which originated in the Persian Gulf, was used extensively from that region around the coast of the Indian Ocean as far as Lanka during the period 16th and 17th centuries.
Larins of more northerly origin that reached Lanka in the course of trade tended to be bent into "fish-hook" shape when they later subserved the currency needs of the island.