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

Red Pencil Urchin

Red Pencil Urchin Full

The red spines are typical to these urchins in Hawaii

When I went underwater for my first snorkel in Hawaii, I was almost immediately met by the oddest-looking urchin that I had ever seen. After some research I found out that I was seeing my first Indo-Pacific endemic urchin, the Red Pencil Urchin; a.k.a. slate pencil urchin or red slate pencil urchin.

With its fat radiolas, or spines, it stood out in stark contrast to any of the urchins I had seen in the Caribbean. The red spines that are found on these urchins is actually most typical to Hawaii. In other parts of the globe, they are yellowish or brown. A fun fact about the spines is that they are porous allowing for fluids to pass through them.

The scientific name for the red pencil urchin is Heterocentrotus mamillatus. The urchin primarily feeds on algae. Many urchins live a sedentary lifestyle, but the red pencil urchin will travel up to 96 cm per day. Red pencil urchins face few predators, but Triggerfish, Wrasses, and Breams will eat this urchin.

This urchin feeds primarily on algae

Did You Know?

  • They can survive in places with strong currents because their spines allow urchins to wedge themselves between rocks.
  • The slate pencil urchin is a herbivore that only eats at night.
  • They are also opportunistic feeders.
This Month's Gallery
Hawaii ocean reef snorkeling underwater urchin

Article by Ben Ivers

Previous StoryYellow-crowned Night Heron
Next StoryBanded Sea Urchin

Related Articles

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

1 Comment

  1. Pingback: Keawakapu Beach

    […] At the north end of Keawakapu Beach, there is a nice outcropping of reef that extends from the shore. We were able to partake in a number of snorkel adventures here and at the south end of the beach. We saw everything from sea turtles to eels and from humuhumunukunukuapua'a to sea urchins. […]

    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