Twelve species of sea cucumber present in the shallow coastal waters of Ilocos Sur and
San Esteban as the most dense area but most varied in Santiago station. Actinophyga echinites,
Holothuria atra and Holothuria leucospilota were common among the areas noted. Site
distribution varies on the different species and month of collection. Most commercial
important species collected attained bigger sizes and found in deeper areas. An average density
per square meter of only 0.08 individual or 14 individuals per 200 square meters as
manifestation of depleted wildstock.