The Sargassumfish is a master of camouflage and is perfectly adapted to life among drifting Sargassum algae. It belongs to the family of anglerfish and has – typical for this group – a type of "fishing pole" (Illicium) on its head, with which it attracts prey. Unlike many other fish, it does not live on the ocean floor, but among floating algae at the water's surface.

Its body is irregularly shaped and often equipped with small skin protrusions that resemble algae. The color varies greatly: from yellowish to green to brown, often with spots or stripes. This adaptation makes it nearly invisible among Sargassum algae. It grows to about 15 to 20 cm. Its pectoral fins are strong and leg-like, allowing it to move almost "walking" through the algae.
Natural enemies include larger predatory fish like tunas or other fast hunters of the open sea. However, its best defense is its perfect camouflage, through which it often goes undetected.
The Sargassumfish is completely harmless and non-toxic to humans. Due to its habitat in open algae fields, it rarely comes into contact with people.
The Sargassumfish can easily change its color and even its body structure to be better camouflaged. It "walks" with its fins through the algae instead of swimming actively. Its lure is a typical feature of anglerfish and serves as bait for prey. It is an important part of the unique ecosystem of Sargassum algae, which provides shelter for many species.