Field trip to Bodega Bay (1/26/14) Finale: My favorite pictures from the day

1) Bat Star and Pisaster right next to each other, with Pisaster’s tube feet visible. Pisaster was more prevalent where there more waves, since it mostly ate mussels, while the bat stars ate more algae, which grew with less waves, so it was cool to see them both right next to each other

2) Scyphozoan Jelly on the mudflats. The red spots are eyespots. We thought the fluffy tan things in the middle might be the oral arms retracted in for low tide. We also thought it (and all the others we found) were dead, but then we put them in a bucket and they were fine. (One thing I learned on this field trip was that cnidarians can in fact survive on the coast at low tides.)

  • Kingdom: Animalia
  • Phylum: Echinodermata
  • Class: Echinoidea

Sand dollars are flattened and disk-shaped and have five rows of tube feet which allow for extremely slow locomotion. The narrow elongated holes in the sand dollar test (shell) are lunules, which serve as channels to help move food from the aboral surface to the oral surface and the mouth. 

Photograph from:


“Chocolate Chip Sea Cucumber” (Isostrichopus badionotus)

Also known as the Cookie Dough Sea Cucumber, the chocolate chip sea cucumber is a species of Stichopodid sea cucumber which is commonly encountered throughout the western Atlantic Ocean, occurring from North Carolina to the Caribbean and south to Brazil, individuals also occur in western-central Africa. Chocolate chip sea cucumbers typically occur in shallow waters with a wide variety of substrates (sand, mud, rock, etc..). Like most sea cucumbers, I. badionotus is a detritivore combing the sea floor for any detritus it encounters. 


Animalia-Echinodermata-Holothuroideaia-Aspidochrotida-Stichopodidae-Isostichopus-I. badionotus

Images: Hans Hillewaert and Iaszlo-photo


This deep sea cucumber belongs to the genus Benthothuria. It moves slowly across the seabed feeding on organic material that has settled down from the surface

When disturbed , Benthothuria flexes its body and empties its gut of heavy sediment. Having come off the bottom, it remains suspended due to the neutral buoyancy of its thick purple body wall. Somehow it gains enough weight to sink and resume feeding

  • Photo by Serpent Project and NOAA Okeanos Explorer Program, Gulf of Mexico 2012 Expedition

Astropecten jonstoni

…is a species of Astropectinid sea star which is endemic to the Mediterranean Sea, where it is known to occur on sandy seabeds at low depths between 1 and 12 meters. Unlike other members of the genus Astropecten, A. jonstoni is mainly active during the day where it will feed on a wide range of molluscs and other marine invertebrates. 


Animalia-Echinodermata-Asteroidea-Paxillosida-Astropectinidae-Astropecten-A. jonstoni

Image: Rpillon

School form Wishiwashi is longer than Rayquaza. It’s 26′11″ long, and the only Pokemon longer than it are Onix, Steelix, Primal Kyogre, Mega Steelix, Mega Rayquaza, Alolan Exeggutor, and Wailord.

Also a cheerful reminder from someone who spent most of a semester studying echinodermata that since Pyukumuku is based on a sea cucumber, that li’l star-shaped feature where the, uh, insides go out? That’s not its mouth, that’s its anus. It’s not puking up its insides, it’s shitting them out.

~*~ BIOLOGY! ~*~

Just wanted to do a simple postmortem recap of my designs for Dimetrodone​‘s  30 Day Phyla Challenge (including some redesigns). It was a fun experience and I spent more time doing research than actually drawing, but I’m still pretty happy with most of my designs! I had multiple designs for Nermertea (2), Annelida (5), Mollusca (4), and Echinodermata (2), so I just chose my favorite designs in those cases.

1. Porifera
2. Placozoa
3. Ctenophora
4. Cnidaria
5. Dicyemida
6. Chaetognatha
7. Platyhelminthes
8. Cycliophora
9. Gastrotricha
10. Rotifera
11. Micrognathozoa
12. Entoprocta
13. Bryozoa
14. Branchiopoda
15. Nemertea
16. Phoronida
17. Annelida
18. Mollusca
19. Priapulida
20. Loricifera  
21. Kinorhyncha
22. Nematoda
23. Nematomorpha
24. Arthropoda
25. Onychophora
26. Tardigrada
27. Xenacoelomorpha
28. Echinodermata
29. Hemichordata
30. Chordata

Super-duper special thanks to dimetrodone for creating the challenge! It was educational, fun, and…well, challenging!

Labidiaster annulatus

…is a species of Heliasterid sea star which is distributed around the Antarctic Peninsula, South Georgia and the South Sandwich Islands, where it occurs in the intertidal zone. Like other large starfish Labidiaster annulatusis a opportunistic predator and scavenger, feeding on a wide range of food items. It is known to feed by climbing to an elevated position (like the top of a rock or sponge) and extending its arms out like fishing rods, grabbing any prey items that swims by.


Animalia-Echinodermata-Asteroidea-Forcipulatida-Heliasteridae-Labidiaster-L. annulatus

Image: WereSpielChequers

Splash the Sea Urchin

Species: Sea urchin(those are members of the phylum Echinodermata, which also includes sea stars, sea cucumbers, brittle stars, and crinoids. Like other echinoderms)

Age: 13

Gender: Male

Likes: to wet people and tourists , scare people with his friend a Killer Whale, Spiky things and though he never tasted them, he likes Pineapples

Dislikes: heighs and to be away from water for extended time,

Flaws: he is a very mischievous boy.. but with no because he likes to bully or for territorial meanings… he just likes to play jokes wich sometimes can not be so funny for the victims,

also if he stays too much time outside the water he gets smelly.. specially on hot days. its not good for his health XD

so because of that.. he has that necklance wich allows him to be all the time he wants outside the water; he got it from Madame Malaria, she is a budú vendor.. so she sends that kind of stuff..

Love interest: a cactus that he thinks its a girl.. he can’t see it clearly because its far far away from the sea.. still he gets to notice a girl shape… XD

Place: he lives on Emerald Coast..

hope u like it! ^-^


Genus: Pearsonothuria

…a monotypic genus of Holothuriid sea cucumbers that houses only one species P. graeffei (Graeffe’s Sea Cucumber). P. graeffei is distributed throughout  the tropical Indo-Pacific, ranging from the east coast of Africa to the Philippines and Indonesia. Like most sea cucumbers Graeffe’s sea cucumber is a scavenger and will roam the seabed sifting through sediment with its feeding tentacles searching for any edible organic material. When threatened P. graeffei is capable of ejecting its cuvierian tubules in hopes to distract any potential predators.


Animalia-Echinodermata-Holothuroidea-Dendrochirotacea-Dendrochirotida-Holothuriidae-Pearsonothuria-P. graeffei

Images: Anders Poulsen and Hectonichus

Northern Pacific Seastar (Asterias amurensis)

…also known as the Japanese Common Starfish, the northern pacific seastar is a species of Asteriid seastar which is native to the coasts of northern China, Korea, Russia, and Japan. It has also been introduced into areas of Tasmania, southern Australia, Alaska, the Aleutian Islands, parts of Europe and Maine. Its history of invasion has been explained through the transport of free-swimming larvae in the ballast water for ships. It has bee known to cause some damage to the ecosystems it invades, and has been listed on “the world’s 100 worst invasive species”.  


Animalia-Echinodermata-Asteroidea-Forcipulatida-Asteriadina-Asteriidae-Astrias-A. amurensis

Image: Lycoo


Horned Sea Star (Protoreaster nodosus)

Also known as the Chocolate Chip or Knobbed Sea Star, the horned sea star is a species of oreasterid sea star that occurs in warm, shallow waters in the Indo-Pacific. Like many other sea stars P. nodosus is an opportunistic carnivore and will feeds mainly on sessile invertebrates and other slow moving invertebrates. The “horns” which give P. nodosus its common name are used mainly to deter potential predators by making it look less palatable.


Animalia-Echinodermata-Asteroidea-Valvatida-Oreasteridae-Protoreaster-P. nodosus

Images: Kareji and Marta Maria Rubio Texeria


Giant Basket Star (Astrophyton muricatum)

…a species of basket star (echinoderms related to brittle stars) found throughout the Caribbean Sea and the Gulf of Mexico. Like all basket stars A.muricatum uses its many branched arms, which are lined with tentacles, to capture passing plankton and small marine invertebrates. During the day the giant basket star will retract its fragile arms and curl into a ball for defense, at night it will extend them to feed.



Image Source(s)

“Sea Potato” (Echinocardium cordatum)

…a species of Loveniid sea urchin which boasts a mostly cosmopolitan distribution. Where it occurs in temperate seas in the north Atlantic, west Pacific, around Australia and New Zealand, as well as South Africa. Sea potatoes are often seen on sandy sea beds, where they will bury themselves constructing small burrows which are lined by mucus secretions. Detritus and other nutrients will collect on these secretions, and made their way to the central area of the burrow, where the sea potato will feed on them. Sea potato burrows are known to house a wide range of commensals, especially the bivalve Tellimya ferruginosa.


Animalia-Echinodermata-Echinoidea-Spatangoida-Loveniidae-Echinocardium-E. cordatum

Image: Hans Hillewaert