acanthonotozoma

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"Red Bull"(Acanthonotozoma inflatum)

Is a species of iphimediid amphipod that is found throughout the Arctic, North Atlantic, and Pacific oceans. Noted for its unique red coloration that earned it its name this amphipod is usually found in red algae, using its coloration as camouflage. However, the “red bull’s” diet consists mostly of bryozoans, instead of the algae it rests on.

Phylogeny

Animalia-Arthropoda-Crustacea-Malacostraca-Peracarida-Amphipoda-Gammaridea-Iphimediidae-Acanthonotozoma-A.inflatum

Image(s): Alexander Semenov

"White Knight" (Acanthotozoma cristatum)

…a species of imphimediid amphipod that is distributed throughout arctic and European waters. Like the closely related "Red Bull" (A.inflatum) the white knight probably feeds mostly on bryozoans and spends its time resting on algae/coral. 

Phylogeny

Animalia-Arthropoda-Crustacea-Malacostraca-Peracarida-Amphipoda-Gammaridea-Iphimediidae-Acanthonotozoma-A.inflatum

Image: Alexander Semenov