Popular and 

 generic names 



Gribbles 

 Limnoria 

 lignorum 



(Rathke) 



Limnoria 

 quadripun 



Limnoria 

 tripunctata 



Damage CharacterUtics 



Ship worms 

 Teredo 



Bankia 

 setacca 

 Tryon 



Adults can grow 

 feet (30.5 to 70 c 

 long; '/S-inch (12 i 



Adults can grow 5 l 

 feet (1.5 to 1.8 m) 

 long; 7/8 inch (22 ir 

 diameter. 



Pholads 

 Martesia 



i 2'A inches (50 to 

 n) long; 1-inch 

 (25.4-n 



Unlike the shipworm's, the size of the 

 entrance hole increases to about V* inch 

 (6mm), making it possible to notice 



Figure 1. Characteristics of marine borers, 

 3 



