Deep sea Transparent creatures Phronima

Fishman found a transparent creature in the sea, What kind of fish is this?

Is it an alien, or a sea monkey? Neither, it's The mystery and transparency of the ocean: Phronima

Phronima colonizes in Salps, Salps are barrel-shaped, gelatinous zooplankton that drifts throughout our oceans. So it would be classed as a parasitoid and not a parasite? Actually, our humans still don't know too much about Phronima.For more info, you can refer to read this article.