相(xiang)比(bi)于(yu)(yu)身側兩個(ge)來說(shuo),蛀船蟲(chong)的身長(chang)較(jiao)長(chang),一(yi)種(zhong)常(chang)見于(yu)(yu)北美水域的蛀船蟲(chong)能長(chang)到2英尺(60厘(li)米)長(chang),而它的殼只有(you)半英寸(cun)(13毫米)長(chang)。世界上有(you)65種(zhong)多(duo)的船蛆,長(chang)度從10英寸(cun)(25厘(li)米)至3英尺(90厘(li)米)多(duo)不等。蛀船蟲(chong)體(ti)表附著的大量的短毛,這些短毛是有(you)毒的。
在(zai)(zai)海(hai)洋(yang)中,木(mu)(mu)船(chuan)(chuan)除了易被海(hai)生(sheng)(sheng)物污損(sun)和微生(sheng)(sheng)物所(suo)腐(fu)蝕(shi)外(wai)(wai),危害最(zui)大的是蛀(zhu)(zhu)船(chuan)(chuan)蟲(chong)。蛀(zhu)(zhu)船(chuan)(chuan)蟲(chong)是能(neng)夠使木(mu)(mu)材(cai)穿(chuan)孔(kong)(kong)的海(hai)洋(yang)生(sheng)(sheng)物,它附(fu)著在(zai)(zai)木(mu)(mu)材(cai)上時(shi),能(neng)在(zai)(zai)木(mu)(mu)材(cai)內(nei)挖掘圓錐形(xing)的孔(kong)(kong)道(dao),侵(qin)入木(mu)(mu)材(cai)內(nei)部(bu),此種(zhong)孔(kong)(kong)道(dao)只有(you)一(yi)個小孔(kong)(kong)與外(wai)(wai)界相(xiang)通(tong),若(ruo)外(wai)(wai)界條(tiao)件(jian)不(bu)利或受(shou)其(qi)他海(hai)生(sheng)(sheng)物攻擊,蛀(zhu)(zhu)船(chuan)(chuan)蟲(chong)就(jiu)鉆到木(mu)(mu)材(cai)的內(nei)孔(kong)(kong)道(dao)內(nei),并分(fen)泌出石灰質,堵(du)塞洞ISl,以抵(di)抗其(qi)他生(sheng)(sheng)物的攻擊。這種(zhong)蛀(zhu)(zhu)船(chuan)(chuan)蟲(chong)一(yi)旦侵(qin)入木(mu)(mu)材(cai)內(nei)部(bu),很(hen)難驅除,導(dao)致木(mu)(mu)材(cai)穿(chuan)孔(kong)(kong)。