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Cifonauta
marine biology image database
11127 photos | 589 videos | 72 tags | 630 species | 89 places
1854 files founds
taxon (class):
Echinoidea
1854 files
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Black sea urchin
Detail of oral region.
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Sea biscuit gamete release (spawning)
Ovules being released through the genital papilla.
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Pluteus larva of a sea biscuit
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Pluteus larva of a sea biscuit united by an arm
Found during an artificial fertilization experiment. We do not know if it is the result of abnormal development or if the larva was reproducing asexually.
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Juvenile sea biscuit
Aboral view.
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Embryo during blastula formation
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Pluteus larva of a sea biscuit
Larva with four pairs of arms.
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Juvenile sea biscuit
Anus on the juvenile aboral surface (red curved structure).
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Gastrula
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Blastula formation
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Second cell division
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Pluteus larva of a sea biscuit
Growth of antero-lateral pair of arms (2nd pair).
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Pluteus larva of a sea biscuit
Early stage with two arms (post-oral).
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Primary mesenchymal cells
Connected by cytoplasmic extensions.
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Pluteus larva of a sea biscuit
Larva with four pairs of arms.
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Juvenile sea biscuit
Ossicles of the lantern of Aristotle in formation at the oral region.
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Advanced blastulation stage
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Sand dollar
The sand dollar Encope emarginata is found on soft sediments in the intertidal and subtidal zones
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Sand dollar
First cleavage
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Pluteus larva of a sea biscuit
Growth of antero-lateral pair of arms (2nd pair).
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Juvenile sea biscuit
Oral region.
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Juvenile sea biscuit
Aboral surface (opposite to mouth).
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Sand dollar
The sand dollar Encope emarginata is found on soft sediments in the intertidal and subtidal zones
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Black sea urchin
Detail of oral region.
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Pluteus larva of a sea biscuit
Larva with six arms.
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Pluteus larva of a sea biscuit
Stage with four pairs of arms.
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Pluteus larva of a sea biscuit
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Embryos during blastulation
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Pluteus larva of a sea biscuit
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Juvenile sea biscuit after metamorphosis
Remnants of the larval skeleton in the aboral region of the juvenile.
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Pluteus
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Sea urchin
Oral view of an adult specimen.
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Embryo during cleavages
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Pluteus larva of a sea biscuit
Larva with four pairs of arms.
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Juvenile sea biscuit after metamorphosis
Ossicles of the lantern of Aristotle in formation at the oral region.
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Primary mesenchymal cells
Secreting the calcareous skeleton.
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Sperm
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Embryo during blastula formation
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Embryo during blastula formation
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Pluteus larva of a sea biscuit
Larva with three pairs of arms and a wide mouth.
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