If you copy and use photos, please WRITE
for PERMISSION first at email just below. Some of these photos are
mine, others are ones I took from the ROV Oceanic Explorer's camera
monitor. If you can help us identify species with a *, please contact me at the email just above. Note: many of the specimens have been deposited at the Field Museum in Chicago and loans of the material can be arranged through Janet Voight (voight@fmnh.org) or John Slapcinsky (Slapcin@fmnh.org) |
| ECHINODERMS:
Holothuroids, Asteroids, Ophiuroids, Echinoids, and Crinoids |
 Scotoplanes; DIAGRAM COURTESY OF PETER BATSON, author of Deep New Zealand - Blue Water, Black Abyss. Please contact him for permission at his website! |
Echinoderms ("spiny skin") are one of the few animal phyla that are totally marine. They typically have a unique five-fold symmetry and a unique locomotory system consisting of hundreds of tube feet. Most groups are quite common in shallow waters, but for unknown reasons, they are extremely successful in the deep. Sea cucumbers (and seapigs --pictures below, and diagrammed to the left) (Holothuroidea) are often the most common macroscopic animal in deep dredges.The seapig Scotoplanes galtheae has been caught at 10,000m in the Kermadec Trench! Most plow along like worms and engulf the deepsea mud, digesting organics and bacteria. However, there are some species which can swim above the bottom. Seastars or Starfish (Asteroidea) creep along with their tube feet and eat live prey and dead remains. Brittle and basket stars (Ophiuroidea) use their flexible arms rather than tube feet. Brittles move through the mud, scooping up organic remains; some brittles and the basket stars catch floating organic particles. Sea urchins (Echinoidea) are ovoid and covered with spines; they probably eat organic remains. They are usually rigid, but some of the abyssal ones are curiously soft and flexible. Sea lilies (Crinoidea) are like inverted starfish, with their arms up in the current to catch organic particles. |
| A. OREGON BATHYAL AND ABYSSAL -- (a) = abyssal plain (2850m), (ob) = continental slope (1800-2000m) off Newport, Oregon |
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Picture moved to Cnidaria
page!
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Sea Cucumber(a)
Molpadia intermedia (50-2800m) |
Swimming Cucumber(a)*
(Benthodtyes sanguinolenta?) (500-5000m) |
Cucumber3(ob)*
uncertain species |
Cucumber4(b)*
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"Winged cucumber" is really an Octocoral!
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Soft Sea urchin(a)
Tromikosoma panamense? (1900-3300m) |
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Slimestar(ob)
Pteraster sp. |
Slimestar2(ob) dorsal*
(Hymenaster pellucidus??) |
Slimestar2 ventral*
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Red seastar(ob)
Hippasterias (californica?) |
Seastar(ob)
Mediaster sp. (tennellus?) |
Mudstar(ob)
Thrissacanthus pencillatus (mainly 300-1500m) |
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Seapig1(a)* -- Scotoplanes
globosa
or clarkii (450-6900m) |
Seapig2(a)
Scotoplanes sp. |
Seastar(ob)
Pseudarchaster parelii (150-2800m) |
Seastar(ob) Solaster sp. (borealis?)
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Seastar(ob)
Zoroaster sp. |
Crinoid(ob)* or sea lily |
Brittle star(ob) Asteronyx (loveni?)
(ophiuroid; 100-2500m) |
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B. CALIFORNIA/OREGON BATHYAL: From Eel River seeps off Eureka at 510-525m (er); Monterey Canyon, 1000 and 1500m deep (mc), and Hydrate Ridge off Newport (OR) at 600m (hr). Photos by me, or taken from ROV monitor and Alvin cameras |
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Seastar (er)
Rathbunaster californicus 134-675m depth |
Sea cucumber (er)
Pannychia moselei? |
Sea urchins (hr)*
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Brittle star Asteronyx sp (er)*
living on seapens |
Brittle stars (er)* from rock, mud
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Crinoid (er)*
living inside Goiter Sponge |
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Sea cucumber?? (er)
from 1200m |
Sea cucumber (mc)*
Pannychia moselei?, 1000m |
Sea cucumber (mc)*
??, 1000m |
Seapig cucumber (mc)
Scotoplanes spp, 1500m |
Bat star (hr)
Dipsacaster sp. |
Red seastar (hr)
Cryptopeltaster lepidonotus |
