There is no scientific name for "fire algae" as a single, specific organism. The term "fire algae" is a general term that can refer to several different types of phytoplankton, most commonly:

* Dinoflagellates: These are single-celled organisms that can produce bioluminescence, giving the water a glowing appearance.

* Noctiluca scintillans: This species is often called "sea sparkle" and is known for its bioluminescent property, making the water appear to sparkle at night.

Therefore, the scientific name depends on the specific type of phytoplankton causing the "fire algae" phenomenon. For example:

* Noctiluca scintillans (for sea sparkle)

* Pyrocystis lunula (another common dinoflagellate that produces bioluminescence)

It's important to remember that "fire algae" is not a specific scientific term, but rather a descriptive term for a phenomenon caused by various organisms.