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I still haven’t gotten over the fact that Hampshire College in Massachusetts has the worlds first non-human resident scholar.

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Helmet Jelly

Periphylla periphylla

The Helmet Jelly can be found at all depths of the ocean. This vibrant and strange jellyfish tends to proliferate in Norwegian fjords. They are one of the dominant predators in these isolated ecosystems. 

Photos

http://www.seawater.no/fauna/cnidaria/periphylla.html

https://www.bigfishexpeditions.com/2019/01/24/norway-deepwater-shark-diving-2018/helmet-jelly/

Sea elephant

Carinaria japonica

The Sea Elephant is a translucent sea snail that has a large muscular body and a tiny triangular shell. Its foot is used for crawling on the ground, and it can be transformed into a fin that is used for swimming. It is called the “sea elephant” because it has a small trunk in its mouth that is used to swallow prey. Furthermore, the Sea Elephant eats arrow worms and jellies.

Photo credit

https://bodegahead.blogspot.com/2014/12/carinaria-part-2.html

http://tolweb.org/Carinaria_japonica/28750

Deep Sea Arrow Worm

Eukrohnia hamata

Arrow worms are small, predatory marine worms that consume copepods, ostracods, and larvae. They resembles a clear, ink pen whizzing through the dark sea. Furthermore, they are found primarily in the Artic Ocean between 700m to 1200m. The picture on the bottom is its head. They have 8 hooks, which are used to grab prey and 25 posterior teeth. Even though the arrow worms are terrifying up close, they are only 4.5 cm in size.

Photo credit:   http://www.arcodiv.org/watercolumn/chaetognaths/Eukrohnia_hamata.html

Physonect Siphonophore

Nanomia cara

The Physonect siphonophore has tiny, bubble shaped sacs that are filled with gas. The sacs are called pneumatophores and help this creature move through the deep ocean. It also has venomous tentacles that stun prey and over eighty stomachs. There are numerous amounts of these strange creatures along the east coast, and they have cause some fisheries to collapse. Furthermore, they can be found at depth between 400m to 1000m.  

Photo credit: http://www.seawater.no/fauna/cnidaria/cara.html

https://www.mindenpictures.com/stock-photo-siphonophore-hydrozoan-cnidarian-nanomia-cara-atlantic-nectophores-naturephotography-image90194961.html

Cigar Comb Jelly

beroe forskalii

The Cigar Comb Jelly is a gelatinous ctenophore that is marveled by many due to its sparkling bioluminescence. It tends to elegantly float around 120 m in the ocean. It uses unique, hair-like structures called ctens to move horizontally in the ocean. It also swims in a spiral pattern before consuming zooplankton in the ocean.

Photo credit: https://www.wrobelphoto.com/gelatinouszooplankton/h25347306

https://www.flickr.com/photos/a_migotto/27227530815

Mid-water Arctic Hydrozoan

Botrynema brucei

The Mid-water Arctic Hydrozoan is a mini-jelly that is transparent with hints of blue. It thrives in freezing cold temperatures and drifts aimlessly in the Artic Ocean. Moreover, it is only 3 cm in size and floats between  900m to 2,600m.

Photo credit: https://en.wikipedia.org/wiki/Botrynema_brucei

http://www.arcodiv.org/watercolumn/cnidarian/Botrynema_brucei.html

Psychedelic Medusa 

Crossota millsae

The Psychedelic Medusa is a deep-sea hydrozoan that is abundant in the North Pacific. The mini-jelly is found at depths between 1000m to 3800m, and are often observed drifting near the ocean floor. It also has an eccentric reproduction behavior uncommon in cnidarians. The females display viviparity, and carry the babies in her bell until they are ready to hatch.   

Photo credit: http://www.arcodiv.org/watercolumn/cnidarian/Crossota_millsae.html

https://twitter.com/spothvegr/status/1030177493075079169

Atolla Jelly

Atolla wyvillei

The Atolla Jelly is a fiery, red jellyfish that has an extraordinary display of bioluminescence. When the jelly is attacked, it uses bioluminescence to produce thousands of vibrant, blue flashes; the blue flashes act as an alarm, which draws in bigger predators and warns prey. The jelly can be found at depths between 600 m to 1500m, and it also has a long  hypertrophied tentacle that aids in reproduction. 

Photo credit: https://en.wikipedia.org/wiki/Atolla_jellyfish

https://en.wikipedia.org/wiki/Atolla_jellyfish

Cockatoo Squid

Galiteuthis phyllura

The Cockatoo squid is a highly-specialized oddity of the deep ocean and found at depths between 300 to 1400 m. It is completely transparent, except for its eyes. It also has bioluminescent photophores that are directed downward: this makes it difficult for deep sea predators to see the Cockatoo Squid. It was named after the Cockatoo because it holds its tentacles above its head, resembling the bird. The Cockatoo squid can also get fairly large with adults reaching lengths of 2.7 meters (over 6 ft.) 

Photocredit: https://www.americanscientist.org/article/at-home-in-the-dark

https://www.pinterest.com/pin/28710516347382519/

Vampire Squid

Vampyroteuthis infernalis

Even though the Vampire Squid is named after a notorious monster, this gentle creature does not live up to its name. It is only a foot long and occupies depths between 650m to 1500m in the deep ocean. Unlike other squids, it has reduced musculature and collects particles in the water column. However, it is capable of huge bursts of speeds. It uses bioluminescence to confuse both predators. 

Photo credit: https://ocean.si.edu/ocean-life/invertebrates/vampire-squid-hell