Wild Boyz Photography Photos of the wild
  • ABOUT
    • OUR MISSION
    • OUR TEAM
      • INTERNSHIP OPPORTUNITY
    • PARTNERS
      • NONPROFIT PARTNERS
      • PRINTING PARTNERS
    • GET INVOLVED
    • CREATIVE COMMONS
    • CONTACT
  • GALLERIES
    • May Gallery 2025
    • April Gallery 2025
    • March Gallery 2025
    • February Gallery 2025
    • January Gallery 2025
    • Archive 2024
      • January Gallery 2024
      • February Gallery 2024
      • March Gallery 2024
      • April Gallery 2024
      • May Gallery 2024
      • June Gallery 2024
      • July Gallery 2024
      • August Gallery 2024
      • September Gallery 2024
      • October Gallery 2024
      • Best of 2024 Gallery
    • Archive 2023
      • January Gallery 2023
      • February Gallery 2023
      • March Gallery 2023
      • April Gallery 2023
      • May Gallery 2023
      • June Gallery 2023
      • July Gallery 2023
      • August Gallery 2023
      • September Gallery 2023
      • October Gallery 2023
      • November Gallery 2023
      • Best of 2023 Gallery
    • Archive 2022
      • January Gallery 2022
      • February Gallery 2022
      • March Gallery 2022
      • April Gallery 2022
      • May Gallery 2022
      • June Gallery 2022
      • July Gallery 2022
      • August Gallery 2022
      • September Gallery 2022
      • October Gallery 2022
      • November Gallery 2022
    • Archive 2021
      • January Gallery 2021
      • February Gallery 2021
      • March Gallery 2021
      • April Gallery 2021
      • May Gallery 2021
      • June Gallery 2021
      • July Gallery 2021
      • August Gallery 2021
      • September Gallery 2021
      • October Gallery 2021
      • November Gallery 2021
      • Best of 2021 Gallery
    • ARCHIVE 2020
      • January Gallery 2020
      • February Gallery 2020
      • March Gallery 2020
      • April Gallery 2020
      • May Gallery 2020
      • June Gallery 2020
      • July Gallery 2020
      • August Gallery 2020
      • September Gallery 2020
      • October Gallery 2020
      • November Gallery 2020
      • Best of 2020 Gallery
    • ARCHIVE 2019
      • April Gallery 2019
      • May Gallery 2019
      • June Gallery 2019
      • July Gallery 2019
      • August Gallery 2019
      • September Gallery 2019
      • October Gallery 2019
      • November Gallery 2019
  • GUEST GALLERIES
    • LIZ MURPHY – NUDIBRANCHS
    • BILL SHAMICK – TURTLES
    • NICK IVERS
    • KBSTRRC
    • MELANIE CHENEY
    • BRUCE LEANDER
    • RELEAF MICHIGAN
    • THE XERCES SOCIETY
    • ROCK HOLLOW WOODS
    • OCEAN DEFENDERS ALLIANCE
    • VERMONT INSTITUTE OF NATURAL SCIENCE
    • SYCAMORE LAND TRUST
    • CORA BERCHEM – SAVE THE MANATEE CLUB
    • BRUCE LEANDER – WILDFLOWER CENTER
    • ALEX NEUFELD – CRF
    • WARD 8 WOODS
  • BLOG
  • |
  • DONATE
  • STORE
  • CARDS
  • ABOUT
    • OUR MISSION
    • OUR TEAM
      • INTERNSHIP OPPORTUNITY
    • PARTNERS
      • NONPROFIT PARTNERS
      • PRINTING PARTNERS
    • GET INVOLVED
    • CREATIVE COMMONS
    • CONTACT
  • GALLERIES
    • May Gallery 2025
    • April Gallery 2025
    • March Gallery 2025
    • February Gallery 2025
    • January Gallery 2025
    • Archive 2024
      • January Gallery 2024
      • February Gallery 2024
      • March Gallery 2024
      • April Gallery 2024
      • May Gallery 2024
      • June Gallery 2024
      • July Gallery 2024
      • August Gallery 2024
      • September Gallery 2024
      • October Gallery 2024
      • Best of 2024 Gallery
    • Archive 2023
      • January Gallery 2023
      • February Gallery 2023
      • March Gallery 2023
      • April Gallery 2023
      • May Gallery 2023
      • June Gallery 2023
      • July Gallery 2023
      • August Gallery 2023
      • September Gallery 2023
      • October Gallery 2023
      • November Gallery 2023
      • Best of 2023 Gallery
    • Archive 2022
      • January Gallery 2022
      • February Gallery 2022
      • March Gallery 2022
      • April Gallery 2022
      • May Gallery 2022
      • June Gallery 2022
      • July Gallery 2022
      • August Gallery 2022
      • September Gallery 2022
      • October Gallery 2022
      • November Gallery 2022
    • Archive 2021
      • January Gallery 2021
      • February Gallery 2021
      • March Gallery 2021
      • April Gallery 2021
      • May Gallery 2021
      • June Gallery 2021
      • July Gallery 2021
      • August Gallery 2021
      • September Gallery 2021
      • October Gallery 2021
      • November Gallery 2021
      • Best of 2021 Gallery
    • ARCHIVE 2020
      • January Gallery 2020
      • February Gallery 2020
      • March Gallery 2020
      • April Gallery 2020
      • May Gallery 2020
      • June Gallery 2020
      • July Gallery 2020
      • August Gallery 2020
      • September Gallery 2020
      • October Gallery 2020
      • November Gallery 2020
      • Best of 2020 Gallery
    • ARCHIVE 2019
      • April Gallery 2019
      • May Gallery 2019
      • June Gallery 2019
      • July Gallery 2019
      • August Gallery 2019
      • September Gallery 2019
      • October Gallery 2019
      • November Gallery 2019
  • GUEST GALLERIES
    • LIZ MURPHY – NUDIBRANCHS
    • BILL SHAMICK – TURTLES
    • NICK IVERS
    • KBSTRRC
    • MELANIE CHENEY
    • BRUCE LEANDER
    • RELEAF MICHIGAN
    • THE XERCES SOCIETY
    • ROCK HOLLOW WOODS
    • OCEAN DEFENDERS ALLIANCE
    • VERMONT INSTITUTE OF NATURAL SCIENCE
    • SYCAMORE LAND TRUST
    • CORA BERCHEM – SAVE THE MANATEE CLUB
    • BRUCE LEANDER – WILDFLOWER CENTER
    • ALEX NEUFELD – CRF
    • WARD 8 WOODS
  • BLOG
  • |
  • DONATE
  • STORE
  • CARDS
January 1, 2020  |  By Ben Ivers

Banded Sea Urchin

Banded Sea Urchin Full

The spinelets on this urchin can sting.

This month I am featuring two urchins. I am always surprised when I come upon a reef that is covered in urchins. They are such peculiar creatures that spend most of their life in the exact same spot every day just eating the algae that is close enough for them to reach. I find them to be equally beautiful and objectionable. They are beautiful for their complexity and delicate spines, and objectionable because of how painful I know that they can be to the touch. The spinelets on this urchin can sting.

The banded sea urchin, or the double spined urchin is in the sea urchin family Diadematidae. Its scientific name is Echinothrix calamaris. The shell is slightly oval, and its spines grow to be 10 to 15 cm in length. The radios are hollow and are often times striped from yellow to dark brown. The banded sea urchin has a visual receptor that gives it a basic vision. They can be found living at the surface all the way down to 230 feet. They are active at night, using their tubed feet to move about.

Fun Facts

  • Triggerfish and wrasses will nibble away their spines and then eat their fleshy undersides.
  • They can shoot their radiolas filled with venom a short distance.
  • Certain species of shrimp and fish live symbiotically within the spines of the banded sea urchin.
  • The banded sea urchin feeds primarily on algae.

The banded sea urchin can shoot their radiolas.

This Month's Gallery
Hawaii ocean reef snorkeling underwater urchin

Article by Ben Ivers

Previous StoryRed Pencil Urchin
Next StoryHonu

Related Articles

  • Yellow Tang Live
    Yellow Tang
  • Queen Conch Live
    Queen Conch

1 Comment

  1. Pingback: Keawakapu Beach

    […] of the beach. We saw everything from sea turtles to eels and from humuhumunukunukuapua'a to sea […]

    Reply

Leave your comment Cancel Reply

(will not be shared)

Donate

About

Matt Hamas and Ben Ivers here. We are focused on fostering a greater understanding and appreciation of the environment. We endeavor to bring you a unique perspective of the wild. Our photos are being placed here for you to enjoy. Please feel free to download any of the photos for your personal use. We are currently seeking partners for printing and developing photos.

  facebook twitter instagram

Categories

Tags

b&w backyard beach big bend bird black and white butterfly camouflage coral desert diving fish florida flower forest guest Hawaii hiking indiana insect kayaking lake landscape light macro maine mountain national park new hampshire ocean reef scuba spider sun sunrise sunset texas tree turtle underwater vermont water weather weird white mountains

WHO WE ARE

  • OUR TEAM
  • PRINTING PARTNERS
  • PARTNERS
  • CONTACT
  • STORE

WHAT WE DO

  • GALLERY
  • GET INVOLVED
  • BLOG
  • OUR MISSION

TRANSPARENCY

GuideStar Platinum Seal of Transparency

EIN: 83-3161428

ABOUT US

Matt Hamas and Ben Ivers here. We are focused on fostering a greater understanding and appreciation of the environment. We endeavor to bring you a unique perspective of the wild. Our photos are being placed here for you to enjoy. Please feel free to download any of the photos for your personal use. We are currently seeking partners for printing and developing photos.

FIND US ELSEWHERE

FacebookTwitterInstagram
Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License