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  • head long, flat, triangular
    elongate body
    2 Ds, on center large thick tail
    C large
  • disc - soft edges
    electric organs behind eyes
    D1 = D2
    mouth tubular, protractile
  • flat, wide body
    2 Ds, on tail
    C asymmetric, lower lobe larger
    mouth opens at front
    large pectorals behind distinct neck
  • disc - thick edges
    electric organs - sides of head
    D1 > D2
    mouth not tubular