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country flag of Exploring photos of the Northern Rock Barnacle taken in United States of America

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  • Northern Rock Barnacle - Semibalanus balanoides Common, intertidal barnacles that resemble volcanoes. They have a membranous base and the outer shell consists of white, overlapping, shell-like plates that grow with the animal.

Habitat: Covering rocks in the intertidal zone. Geotagged,Semibalanus balanoides,Summer,United States,barnacle,barnacles
    Northern Rock Barnacle - Semibalanus balanoides
  • Northern Rock Barnacle - Semibalanus balanoides Common, intertidal barnacles that resemble volcanoes  or dragon eyes. This rock had multiple generations as you can see from the variations in size.

They have a membranous base and the outer shell consists of white, overlapping, shell-like plates that grow with the animal.

Habitat: Encrusted on rocks in the low tide zone
 Geotagged,Semibalanus balanoides,Spring,United States,barnacle,northern barnacle
    Northern Rock Barnacle - Semibalanus balanoides
  • Northern Rock Barnacle - Semibalanus balanoides Common, intertidal barnacles that resemble volcanoes.  They have a membranous base and the outer shell consists of white, overlapping, shell-like plates that grow with the animal.  Geotagged,Northern Rock Barnacle,Semibalanus,Semibalanus balanoides,Spring,United States,acorn barnacle,barnacle
    Northern Rock Barnacle - Semibalanus balanoides
  • Northern Rock Barnacle (Adults, Juveniles, and Cypris) - Semibalanus balanoides The adults are the large barnacles to the right. The juveniles are the smaller ones in the middle. And, the cypris are the brownish, ovalish specks to the left in the photo. 

Northern rock barnacles are hermaphrodites, but cannot fertilize themselves. Copulation is followed by internal fertilization. The eggs (up to 10,000!) remain inside the shell.  The eggs hatch into free-swimming larvae, which is followed by a unique cypris larval stage. The cypris larvae spend their time seeking a habitable substrate. Once it settles on a spot, it metamorphoses into its adult form, but is called a "juvenile" as it is much smaller than its ultimate size will be.

Habitat: Low tide zone
https://www.jungledragon.com/image/89871/northern_rock_barnacle_cypris_larvae_-_semibalanus_balanoides.html Cyprid,Geotagged,Semibalanus balanoides,Spring,United States,cypris
    Northern Rock Barnacle (Adults, Juveniles, and Cypris) - Semibalanus balanoides
  • Northern Rock Barnacle - Semibalanus balanoides Common, intertidal barnacles that resemble volcanoes or dragon's eyes :P. They have a membranous base and the outer shell consists of white, overlapping, shell-like plates that grow with the animal.

Habitat: Adhered to a snail in the intertidal zone
https://www.jungledragon.com/image/81089/northern_rock_barnacle_-_semibalanus_balanoides.html Geotagged,Semibalanus balanoides,Spring,United States,barnacle,northern rock barnacle
    Northern Rock Barnacle - Semibalanus balanoides
  • Northern Rock Barnacle - Semibalanus balanoides Barnacles are sessile filter feeders. The use feathery, thoracic appendages, called cirri, to capture plankton and detritus from the water column. 

When there is a current, the barnacles hold their cirri stiffly into the flow. But, when there is no current, the barnacles pulse their cirri rhythmically, in and out of their shell. Their cirri are also used as gills to extract oxygen from the water.

Habitat: Encrusted on rocks and starting to feed again as the tide was starting to come back in.

https://www.jungledragon.com/image/89955/northern_rock_barnacle_-_semibalanus_balanoides.html
https://vimeo.com/391816393 Geotagged,Semibalanus balanoides,Spring,United States,barnacle,barnacle cirri,northern rock barnacle
    Northern Rock Barnacle - Semibalanus balanoides
  • Northern Rock Barnacle - Semibalanus balanoides Habitat: subtidal Geotagged,Northern Rock Barnacle,Semibalanus,Semibalanus balanoides,Spring,United States,barnacle
    Northern Rock Barnacle - Semibalanus balanoides
  • Northern Rock Barnacle - Semibalanus balanoides This is the crowded form of the northern rock barnacle. When crowded, they take a columnar or twisted shape that can be up to 25 mm long. You can see a bunch of little things attached to this barnacle - mussels and smaller barnacles.

*Note: This barnacle was dead. I wouldn't have uprooted it otherwise.

Habitat: Crowded colony in the intertidal
https://www.jungledragon.com/image/89869/northern_rock_barnacle_-_semibalanus_balanoides.html Geotagged,Semibalanus balanoides,Spring,United States,barnacle
    Northern Rock Barnacle - Semibalanus balanoides
  • Northern Rock Barnacle - Semibalanus balanoides Barnacles are sessile filter feeders. The use feathery, thoracic appendages, called cirri, to capture plankton and detritus from the water column. 

When there is a current, the barnacles hold their cirri stiffly into the flow. But, when there is no current, the barnacles pulse their cirri rhythmically, in and out of their shell. Their cirri are also used as gills to extract oxygen from the water.

Habitat: Encrusted on rocks and starting to feed again as the tide was starting to come back in
https://www.jungledragon.com/image/89952/northern_rock_barnacle_-_semibalanus_balanoides.html

https://vimeo.com/391816393 Geotagged,Semibalanus balanoides,Spring,United States,barnacles
    Northern Rock Barnacle - Semibalanus balanoides
  • Northern Rock Barnacle - Semibalanus balanoides Common, intertidal barnacles that resemble volcanoes or dragon's eyes :P. They have a membranous base and the outer shell consists of white, overlapping, shell-like plates that grow with the animal.

Habitat: Adhered to a snail in the intertidal zone
https://www.jungledragon.com/image/81088/northern_rock_barnacle_-_semibalanus_balanoides.html Geotagged,Semibalanus balanoides,Spring,United States
    Northern Rock Barnacle - Semibalanus balanoides
  • Northern Rock Barnacle - Semibalanus balanoides This is the crowded form of the northern rock barnacle. When crowded, they take a columnar or twisted shape that can be up to 25 mm long. You can see a bunch of little things attached to this barnacle - mussels, a periwinkle, and smaller barnacles.

*Note: This barnacle was dead. I wouldn't have uprooted it otherwise.

Habitat: Crowded colony in the intertidal
https://www.jungledragon.com/image/89868/northern_rock_barnacle_-_semibalanus_balanoides.html Geotagged,Semibalanus balanoides,Spring,United States
    Northern Rock Barnacle - Semibalanus balanoides
  • Northern Rock Barnacle (Cypris Larvae) - Semibalanus balanoides The cypris larvae are the brownish, ovalish specks to the left in the photo.

Northern rock barnacles are hermaphrodites, but cannot fertilize themselves. Copulation is followed by internal fertilization. The eggs (up to 10,000!) remain inside the shell. The eggs hatch into free-swimming larvae, which is followed by a unique cypris larval stage. The cypris larvae spend their time seeking a habitable substrate. Once it settles on a spot, it metamorphoses into its adult form, but is called a "juvenile" as it is much smaller than its ultimate size will be.

Habitat: Low tide zone
https://www.jungledragon.com/image/89870/northern_rock_barnacle_adults_juveniles_and_cypris_-_semibalanus_balanoides.html Geotagged,Semibalanus balanoides,Spring,United States,barnacle,barnacle cypris,cypris,larvae
    Northern Rock Barnacle (Cypris Larvae) - Semibalanus balanoides
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