Skip to content
Poseidon's Web

Poseidon's Web

Explain the Reef!

  • Home
  • Fishes
    • Bony Fish Basics
    • Who’s Who – Fishes
    • Shark & Ray Basics
  • Corals
    • Coral Basics
    • Who’s Who – Corals
    • Coral – Trending
  • Invertebrates
    • Who’s Who – Critters
    • Algae
    • Crustaceans
    • Horseshoe Crabs
    • Echinoderms
    • Jellyfish
    • Mollusks
    • Sponges
    • Worms
  • Mammals & Reptiles
    • Who’s Who – Marine Mammals, Reptiles & Birds
  • Reef Dynamics
  • Archive Highlights
  • About
  • By the Numbers: Tunicates, Different from Sponges

    Not everything that looks like a sponge is a sponge. Covered by the “tunics” that give them their names, outwardly,

  • Stingrays, Eagle Rays, Manta Rays: An Uplifting Tale

    Rays are the other star-power cartilaginous fishes, outnumbering sharks in species and matching them in variety of lifestyles. Stingrays lurk

  • Damselfish: Small, Shy, Feisty

     Damselfish like Threespot, Dusky and Bicolor Damsels don’t have the celebrity status of more charismatic members of Family Pomacentridae like

  • What are Copepods? Essential to the Web of Life

     What are Copepods? They’re tiny, ungainly crustaceans. Often barely visible to us, they aren’t on anyone’s must see list. But

  • Fire Corals: Sneaky, Painful & Masters of Disguise

    What are fire corals? Well, they’re not true corals, although their talent for stinging certainly lives up to the fire

  • Benthic & Pelagic Fishes: Defining Oceanic Lifestyles

    Describing pelagic fishes is easy: They swim, feed and just hang out in the open ocean, a pretty consistent pattern

FRONT PAGE – LATEST FEATURES

By the Numbers: Tunicates, Different from Sponges

June 13, 2021

Stingrays, Eagle Rays, Manta Rays: An Uplifting Tale

May 24, 2021

Damselfish: Small, Shy, Feisty

April 30, 2021

What are Copepods? Essential to the Web of Life

November 5, 2020

Fire Corals: Sneaky, Painful & Masters of Disguise

October 19, 2020

Benthic & Pelagic Fishes: Defining Oceanic Lifestyles

August 1, 2020

HIGHLIGHTS – FEATURES FROM THE ARCHIVES

Seeing Sea Anemones – for Themselves

August 2, 2019

Sea Pigs: Amazing Sea Cukes You’ll Never See

July 6, 2019

Black Coral: Many Colors – But Rarely Black

June 15, 2019

Balloonfish & Porcupinefish: Big Eyes, Mona Lisa Smile

June 5, 2019

Stony, Soft or Gorgonian, They’re All Coral Polyps

June 1, 2019

Iguanas in the Galapagos: Here Come the Marines

May 17, 2019

WHO’S WHO – BONY FISHES

Bermuda Chubs: Just Hangin’ Around

May 1, 2021 neptune3-ca

Bermuda Chubs (Kyphosus sectatrix) are sort of the Charlie Browns of reef fish. Where many

Read more

Damselfish: Small, Shy, Feisty

April 30, 2021

Barracudas: A Tale of the Teeth

April 23, 2021

Why Are Flounders Flat? Because it Works.

June 27, 2020

BONY FISH BASICS

Benthic & Pelagic Fishes: Defining Oceanic Lifestyles

August 1, 2020

How Fish Feed: For One Thing, They Suck It Up

November 16, 2019

Video Sidebar: Fish Bottomfeeding Strategies

November 16, 2019

How Fish Breathe: Ram Ventilation, Buccal Pumping

September 14, 2019

Osteichthyes vs. Chondrichthyes, Bony vs. Cartilaginous

July 10, 2019
how do fish sleep

How Fish Sleep: By Resting, Snoozing & Totally Zonking Out

April 7, 2019

WHO’S WHO – CORALS & GORGONIANS

True Soft Corals: Beautiful, with an Identity Problem

January 12, 2020 neptune3-ca

True soft corals are among the most beautiful gems of the reef, yet they’re difficult

Read more

Bubble Coral: Soft On Top, Stony Underneath

September 28, 2019

Black Coral: Many Colors – But Rarely Black

June 15, 2019

Stony, Soft or Gorgonian, They’re All Coral Polyps

June 1, 2019

Sea Fans, Rods & Plumes: Thinking Outside the Calyx

May 4, 2019

WHO’S WHO – INVERTEBRATES

By the Numbers: Tunicates, Different from Sponges

June 13, 2021

What are Copepods? Essential to the Web of Life

November 5, 2020

Fire Corals: Sneaky, Painful & Masters of Disguise

October 19, 2020

Do Sea Urchins Sting? No, But They Hurt All the Same

May 23, 2020

Akin to Brittlestars, Basket Stars Network in the Dark

May 2, 2020

Stars of Doom: Crown of Thorns Starfishes

April 19, 2020

WHO’S WHO – MARINE MAMMALS, REPTILES & BIRDS

Iguanas in the Galapagos: Here Come the Marines

May 17, 2019

Snakes on the Reef! They Won’t Bother You. Probably.

April 8, 2019

Haunting Video of a Stray Narwhal Adopted by Belugas

October 9, 2018

In The Galapagos, Penguin Gender Can Be Told by Beak Size

July 12, 2018

Baleen Whales Are Just the Size they Ought to Be

April 23, 2018

The Penguin Selfie: Better Than Yours

March 29, 2018

SEARCH THIS SITE

FISHY THUMBNAILS

Fishy Thumbnails: Angelfish to Frogfish

May 18, 2021

Thumbnail sketches of fishes you’re likely to see at dive destinations like Bonaire and Belize.

Read more

Fishy Thumbnails: Goatfish to Pufferfish

May 17, 2021

Thumbnail Sketches of fishes you’re likely to see at dive destinations like Bonaire and Belize.

Read more

Fishy Thumbnails: Rays to Wrasses

May 16, 2021

Thumbnail sketches of the fishes you’re likely to see at dive destinations like Bonaire and

Read more

THE WORD

Benthic & Pelagic Fishes: Defining Oceanic Lifestyles

August 1, 2020

Fevers, Shivers & Risks: Marine Animal Group Names

March 22, 2020

Osteichthyes vs. Chondrichthyes, Bony vs. Cartilaginous

July 10, 2019

FUNKY

Sea Turtles Fake Out Predators with Decoy Turtle Nests

May 20, 2020

Seeking Fish, Patrolling Albatrosses Join the Cops

February 1, 2020

Marine Life Stamps: When Snail Mail Is Really Fishy

October 26, 2019

POSEIDON MEDIA

Video Sidebar: Fish Bottomfeeding Strategies

November 16, 2019

 Diving with Manta Rays: Atlantic Giant Manta Encounter

October 22, 2018

Bluehead Wrasses – The Great Damselfish Egg-Raid

October 21, 2018

EXPLAIN THE REEF!

JUST GOING UNDERWATER AND LOOKING AT STUFF IS NOT THE SAME as Understanding the Reef! Poseidon’s Web works to explain Who’s Who, What’s What…and Why!

SUBSCRIBE FOR NEW POST NOTIFICATIONS

EXPLAINERS

Seahorse Anatomy: Differences Way Beyond “Cute”

January 1, 2020

How Fish Breathe: Ram Ventilation, Buccal Pumping

September 14, 2019

The Lionfish Enigma: Atlantic Threat But Not Pacific

July 13, 2019

Octopuses & Squids: Support Your Local Cephalopod

June 23, 2019

Stomach-Everting, Arm-Regenerating Starfish Explained

January 15, 2019

Barnacles: Sticky Crustaceans Explained

December 23, 2018

Nudibranchs: Fantastic Mollusks Explained

November 17, 2018

Manta Rays: Gentle Giants Explained

October 22, 2018

PLACES

Bonaire 2018: Old Standbys, “New” Sites. Who Knew?

January 28, 2018

The Philippines: In the Triangle

July 4, 2017

REEF DYNAMICS

What are Copepods? Essential to the Web of Life

November 5, 2020

Woodsy Perhaps, But Mangrove Forests are Essential Parts of the Reef

August 9, 2019

Follow Us on Social Media

  • Facebook
  • Twitter
  • Instagram
  • Google
Copyright Poseidon's Web, 2019. WordPress Theme: Gambit by ThemeZee.
 

Loading Comments...