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Botrynema brucei Hydrozoa

Botrynema brucei is commonly referred to as Hydrozoa. Difficulty in the aquarium: Cold water animal. Toxicity: Toxic hazard unknown.


Profilbild Urheber Admin Meerwasser-Lexikon

CC BY-SA 4.0 Aino Hosia/Universitetsmuseet i Bergen, Universitetet i Bergen
Courtesy of the author Admin Meerwasser-Lexikon

Uploaded by AndiV.

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lexID:
17641 
AphiaID:
117615 
Scientific:
Botrynema brucei 
German:
Tiefsee-Meduse 
English:
Hydrozoa 
Category:
 
Family tree:
Animalia (Kingdom) > Cnidaria (Phylum) > Hydrozoa (Class) > Trachymedusae (Order) > Halicreatidae (Family) > Botrynema (Genus) > brucei (Species) 
Initial determination:
Browne, 1908 
Occurrence:
Aleutian Islands, Antarctica, Arctic (North Polar Sea), California, Central Pazific, Chile, East cost of USA, European Coasts, Florida, Gulf of Alaska (Pacific), Indian Ocean, Lasarev Sea (marginal sea in the Southern Ocean), New Zealand, North Atlantic Ocean, North Pacific (Ocean), Northeast Pacific Ocean, South Georgia and the South Sandwich Islands, Weddell Sea, West Coast USA 
Marine Zone:
Bathypelagial
The bathypelagial ranges from 1000 to 4000 meters depth.
The pressure in this depth zone is up to approx. 400 bar (4,000 tons per square meter or 400 kg per square centimeter.
There is no light left, only fish and bacteria can produce light in the form of bioluminescence.
 
Sea depth:
200 - 3500 Meter 
Habitats:
Water Column 
Size:
0.79" - 1.18" (2,5cm - 3cm) 
Temperature:
°F - 4,46 °F (°C - 4,46°C) 
Food:
Zooplankton 
Difficulty:
Cold water animal 
Offspring:
Not available as offspring 
Toxicity:
Toxic hazard unknown 
CITES:
Not evaluated 
Red List:
Not evaluated (NE) 
Related species at
Catalog of Life
:
 
Author:
Publisher:
Meerwasser-Lexikon.de
Created:
Last edit:
2025-08-10 13:06:26 

Info

Jellyfish and anemones are often disparagingly referred to as “brainless slime,” yet they play an important role in the marine food chain, providing protection for young fish under their bell-shaped bodies or for the well-known anemone fish in their tentacles, which are poisonous to other creatures.

At a depth of 3,500 meters, the water pressure is 350 bar, or in other words > 3,500 tons per square meter or 300 kg per square centimeter, which is an amazing feat for a jellyfish.
Anyone who has ever held a dead jellyfish in their hand knows how quickly the jellyfish tissue runs through your fingers.

The study of Trachymedusa botrynema has a long history of research, spanning over 120 years of deep-sea exploration.
Within Botrynema, two different morphotypes are distinguished: one with a characteristic apical knob and another without.
Both morphotypes occur in the subspecies Botrynema brucei ellinorae, while only specimens with a knob are known from the other species of Botrynema brucei.
Specimens with a knob have been reported from all oceans and latitudes, while specimens without a knob are only known from Arctic and subarctic regions.

Currently, WoRMS lists Botrynema brucei ellinorae (Hartlaub, 1909) as synonymous with Botrynema brucei Browne, 1908

Let's wait and see whether the cited article will lead to changes.

The world of science is always changing, and so is knowledge!

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