Sea potato
A species of Heart urchins Scientific name : Echinocardium cordatum Genus : Heart urchins
Sea potato, A species of Heart urchins
Botanical name: Echinocardium cordatum
Genus: Heart urchins
Content
Description
Photo By 3268zauber , used under CC-BY-SA-3.0 /Cropped and compressed from original 
Description
The sea potato is a heart-shaped urchin clothed in a dense mat of furrowed yellowish spines which grow from tubercles and mostly point backwards. The upper surface is flattened and there is an indentation near the front. This urchin is a fawn colour but the tests that are found on the strandline have often lost their spines and are white. During life, the spines trap air which helps prevent asphyxiation for the buried urchin. The ambulacrum forms a broad furrow in a star shape extending down the sides of the test. There are two series each of two rows of tube feet. The test reaches from six to nine centimetres in length.
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Scientific Classification
Phylum
Echinoderms Class
Sea urchins Order
Heart urchins Family
Porcupine heart urchins Genus
Heart urchins Species
Sea potato 
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