Chorda
Chorda is a genus of thalloid brown algae. It is the only genus in the family Chordaceae. Its members are known by a number of common names including: mermaid's fishing line, tsurumo, ruálach, doruithe briain, sailors' laces, sea laces, mermaids line, roccálach, ruadhálach, gemeine meersaite, bootlace weed, seatwine, zottige meersaite, dead men's ropes, mermaid's tresses, cat gut and sea lace.

Species
The known species belonging to this genus are:
Chorda asiatica
Chorda borealis
Chorda filum
Chorda kikonaiensis
Chorda minuta 
Chorda rigida

References
External links
 Media related to Chorda at Wikimedia Commons
Images of Chorda at Algaebase