The inner surface of their cup-shaped mouth is armed with pointed teeth, with which they perforate the integuments of the fish attacked, scraping off particles of the flesh and sucking the blood.
A large number of corals, both aporose and perforate, are colonial.
- Solitary or colonial perforate corals, branching, massive, or encrusting.
- Colonial branching or palmate perforate corals, with abundant trabecular coenenchyme.
In order to measure the pH directly; the kit includes a plastic auger to perforate the ground.