Notobranchaeidae is a taxonomic family

Family (biology)

In biological classification, family is* a taxonomic rank. Other well-known ranks are life, domain, kingdom, phylum, class, order, genus, and species, with family fitting between order and genus. As for the other well-known ranks, there is the option of an immediately lower rank, indicated by the...

 of floating sea slugs or "sea angels", pelagic marine

Marine (ocean)

Marine is an umbrella term. As an adjective it is usually applicable to things relating to the sea or ocean, such as marine biology, marine ecology and marine geology...

 opisthobranch gastropod mollusks.

The small pelagic snails of this family have no shell (except in the early embryo

Embryo

An embryo is a multicellular diploid eukaryote in its earliest stage of development, from the time of first cell division until birth, hatching, or germination...

nic stage). They are carnivore

Carnivore

A carnivore meaning 'meat eater' is an organism that derives its energy and nutrient requirements from a diet consisting mainly or exclusively of animal tissue, whether through predation or scavenging...

s, equipped with swimming parapodia

Parapodium

Parapodia , singular parapodium, are paired, un-jointed lateral outgrowths from the bodies of two different invertebrate groups, which are primarily marine in habitat...

 (fleshy winglike flaps), strong jaws and grasping tentacles, often with suckers resembling those of cephalopod

Cephalopod

A cephalopod is any member of the molluscan class Cephalopoda . These exclusively marine animals are characterized by bilateral body symmetry, a prominent head, and a set of arms or tentacles modified from the primitive molluscan foot...

s.

A more comprehensive discussion can be found under the entry Sea angel

Sea angel

Sea angels previously known as one kind of pteropod, are a large group of small swimming sea slugs in six different families. These are pelagic marine opisthobranch gastropod molluscs in the clade Gymnosomata within the larger clade Heterobranchia....

.

Genera and species

Genera and species in the family Notobranchaeidae include:
Genus: Notobranchaea Pelseneer

Paul Pelseneer

Jean Paul Louis Pelseneer was a Belgian malacologist, morphologist, ethologist and phylogenist....

, 1886

• Notobranchaea bleekerae van der Spoel & Pafort-van Iersel, 1985
  • Distribution : Oceanic
• Notobranchaea grandis Pruvot-Fol
  Alice Pruvot-Fol
  Alice Pruvot-Fol was a French opisthobranch malacologist.She was the author of many new species, mostly described on the basis of preserved animals....
  
  , 1942
  • Distribution : Oceanic
  • Length : 15 mm
• Notobranchaea inopinata Pelseneer
  Paul Pelseneer
  Jean Paul Louis Pelseneer was a Belgian malacologist, morphologist, ethologist and phylogenist....
  
  , 1887
  • Distribution : Oceanic
  • Length : 5 mm
• Notobranchaea macdonaldi Pelseneer
  Paul Pelseneer
  Jean Paul Louis Pelseneer was a Belgian malacologist, morphologist, ethologist and phylogenist....
  
  , 1886
  • Distribution : Bermuda, Oceanic
  • Length : 5 mm
• Notobranchaea tetrabranchiata Bonnevie, 1913
  • Distribution : Oceanic
  • Length : 16 mm