Icy Inverts
Animal Page
 
 
Below is a brief introduction to some of the animals that we will examine
 
 
 
Adults
Larva

Annelids: invertebrate phylum of about 16,500 species of segmented worms that include familiar species such as earthworms, leeches and a wide variety of other forms including sand and tube worms

Polychaetes: most marine worms belong to this group because they have appendages

Nectochaete
Crustaceans: animals such as krill, shrimp and lobsters that have a hard external shell that protects their body    

Amphipods: a group of laterally compressed crustaceans
 

Cirripedia: barnacles

Cypris

Copepods: a very common planktonic crustacean
 

Euphausids: krill; planktonic shrimp-like animals
 

Isopods: a group of dorsal-ventrally flattened animals

 

Ostracods: planktonic crustaceans that look like clams
 
Ctenophores: transparent, planktonic jelly-like animals
 
Echinoderms: marine invertebrate phylum of about 7,000 species that includes sea stars, sand dollars, sea urchins and others that have 5-part symmetry; most adults in this phylum are benthic
 

Asteroids: sea stars; body is star-shaped with five or more arms coming off a central disk

Brachiolaria

Crinoids: sea lilies and feather stars; body forms a cup with arms extending out from the cup

 

Echinoids: sea urchins and sand dollars; body is globe-shaped with spines

Echinopluteus

Holothuroids: sea cucumbers; body is sausage-shaped and long

 

Ophiuroids: brittle stars; body has five arms distinctly separated from a central disk

 
Foraminiferans: planktonic protists with a calcareous shell
 
Molluscs: invertebrate phylum of about 93,000 species almost all of which have an inner or outer shell and a soft body; includes clams, snails, sea slugs, octopus, squid and other shelled invertebrates
 

Bivalves: molluscs with two shells hinged together

 

Cephalopods: octopus and squid; molluscs with a well- developed head

 

Gastropods: molluscs with a single, often spiraled shell

Veliger

Nudibranchs: a group of shell-less gastropods
 
Nemerteans: ribbon worms; unsegmented worms that can extend their bodies

Pilidium
Pterobranchs: a small colonial group of hemichordates, related to echinoderms
 
Pycnogonids: sea spiders; marine members of the phylum Arthropoda, more closely related to spiders than crabs or insects
 
Radiolaria: planktonic protists with spines made of silica
 
Salps: marine planktonic members of the group Tunicata; closely related to sea squirts