Nudibranchs are small soft bodied creatures that live underwater in the oceans of the world. Some nudibranchs are beautifully colorful, while some are cryptically camouflaged.

This site has some general information on nudibranchs and sea slugs. You will also find specific information on and underwater photos of the nudibranchs of Guanacaste, Northwestern Costa Rica.

The different shapes nudibranchs come in are described in the anatomy section.

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Find out more about each sea slug by clicking on a thumbnail or selecting from the drop down list below.

  • Aplysia dactylomela
  • Aplysia parvula
  • Atagema sp?
  • Flabellina stohleri
  • Berthellina ilisima
  • Chromodoris sphoni
  • Crosslandia daedali
  • Dendrodoris fumata
  • Discodoris aurila
  • Dolabrifera dolabrifera
  • Elysia diomedia
  • Flabellina marcusorum
  • Glossodoris dalli
  • Glossodoris sedna
  • Hypselodoris agassizii
  • Hypselodoris ghiselini
  • Mexichromis antonii
  • Navanax aenigmaticus
  • Notarchus indicus
  • Noumeaella rubrofasciata
  • Petalifera petalifera?
  • Pleurobranchus areolatus
  • Spurilla neapolitana
  • Stylocheilus striata
  • Tambja abdere
  • Tambja? eliora?
  • Tayuva ketos