Bigfin Squid: The Deep-Sea Squid With Elbows
Discover the mysterious bigfin squid (Magnapinna), the deep-sea cephalopod with elbow-like arms. Explore its anatomy, habitat, behavior, and ongoing scientific mysteries.
June 2026
Promachoteuthis sulcus: The Squid With Human-Like Teeth
Discover Promachoteuthis sulcus, the deep-sea squid famous for its human-like teeth. Explore its discovery, anatomy, habitat, and the mysteries of this rare cephalopod.
December 2025
Blue-Ringed Octopus: The Deadliest Octopus
Blue-ringed octopuses weigh just 28g but carry enough tetrodotoxin to kill 26 humans. Expert guide to one of the deadliest marine animals on Earth.
Coconut Octopus: Tool Use in an Invertebrate
Coconut octopuses carry coconut shells for shelter and walk bipedally across sandy bottoms. Expert guide to octopus tool use and why it's so remarkable.
Colossal Squid: The Largest Invertebrate
Colossal squid weigh 500kg with the largest eyes of any animal. Expert guide to the Antarctic giant that's actually bigger than the famous giant squid.
Cuttlefish: The Color-Changing Masters Who Are Colorblind
Cuttlefish change color faster than any animal despite being completely colorblind. Expert guide to how they see and why their chromatophores are unique.
Firefly Squid: Bioluminescence in Toyama Bay
Firefly squid gather in millions each spring in Toyama Bay, producing spectacular blue bioluminescent displays. Expert guide to nature's light show.
Flamboyant Cuttlefish: The Toxic Walker
Flamboyant cuttlefish walk on the seafloor and flash bright colors as warnings. Expert guide to the only toxic cuttlefish and why they're so unusual.
The Giant Squid Behind the Kraken Legend
Giant squid reach 13 meters and have the largest eyes of any animal. Expert guide to the real kraken, why they remained mythical until 2004, and their deep sea life.
November 2025
How the Mimic Octopus Impersonates Other Species
The mimic octopus impersonates flounders, sea snakes, lionfish, and more on demand. Expert guide to the most convincing animal mimic ever discovered.
Nautilus: Ancient Cephalopods That Have Endured Time
Nautiluses have existed essentially unchanged for 500 million years, predating dinosaurs. Expert guide to the last shelled cephalopods and their ancient lineage.
Octopus Intelligence: From Problem Solving to Escape
Expert analysis of octopus cognition covering tool use, maze solving, jar opening, camouflage decisions, distributed nervous systems, memory, play behavior, and documented escape feats from aquariums worldwide.
Dumbo Octopus Life in the Deep Sea
Dumbo octopuses live 7,000 meters deep with floppy ear-like fins and swallow prey whole. Expert guide to the deepest octopus and why everyone loves them.
Vampire Squid Deep-Sea Adaptations
Vampire squid live 3,000m deep in the ocean's oxygen minimum zone and eat floating dead matter. Expert guide to the only cephalopod that doesn't hunt live prey.
October 2025
Octopus: Alien-like Biology
Octopuses have three hearts, nine brains, and blue copper-based blood. Expert guide to the most alien biology on Earth and why octopus intelligence works the way it does.
Octopuses: Alien Intelligence Unveiled
Discover why octopuses are considered the closest thing to alien intelligence on Earth. Expert-written guide covering their three hearts, blue blood, distributed nervous system, instant camouflage, problem solving, and the science behind cephalopod cognition.
August 2025
Giant Pacific Octopus: The Ocean's Giant
Everything about the giant Pacific octopus: size, habitat, diet, intelligence, reproduction, conservation, and the strange facts that make Enteroctopus dofleini the largest octopus species on Earth.
June 2025
Mimic Octopus: Habitat, Size and Behaviour
Everything about the mimic octopus: habitat, diet, behaviour, context-dependent mimicry, reproduction, conservation, and the strange facts that make Thaumoctopus mimicus the only animal known to impersonate more than a dozen species.
Giant Squid: Elusive Ocean Ruler
Everything about the giant squid: size, deep-sea habitat, basketball-sized eyes, sperm whale battles, Kraken legends, and the strange facts that make Architeuthis dux the ocean's most elusive giant.
May 2025
Ammonites: The Spirals of Time
Everything about ammonites: shell shape, suture patterns, size range, 340-million-year fossil record, closest living relatives, the K-Pg extinction that killed them, and the cultural legends that grew up around their spiral shells.
April 2025
Blue-Ringed Octopus: A Toxic Wonder
Everything about the blue-ringed octopus: size, habitat, tetrodotoxin venom, iridescent warning pulse, reproduction, conservation, and the strange facts that make Hapalochlaena lunulata one of the most venomous marine animals on Earth.
Vampire Squid: Unique Deep-Sea Cephalopod
Everything about the vampire squid: habitat, detritus diet, bioluminescent defence, anatomy, reproduction, and the strange facts that make Vampyroteuthis infernalis a living relic of the deep sea.
March 2025
Cameroceras: The Giant Nautiloid
Everything about Cameroceras: the giant Ordovician nautiloid with a straight conical shell up to six metres long, apex predator of 470-million-year-old seas, its role in end-Ordovician extinction, anatomy, diet, and why it may be the largest mollusc ever.
February 2025
Common Octopus
Everything about the common octopus: size, habitat, diet, intelligence, reproduction, conservation, and the strange facts that make Octopus vulgaris the most-studied cephalopod on Earth and a species complex of cryptic relatives.
Dumbo Octopus: The Deep Sea's Gentle Giant
Everything about the dumbo octopus: the deepest-living octopus on Earth, its Disney-inspired name, ear-like swimming fins, 7,000 metre depth records, asynchronous egg-laying, and why it was never filmed alive until 1999.