Cephalopods
Flamboyant Cuttlefish
Metasepia pfefferi · Cephalopod mollusk — family Sepiidae; a dwarf cuttlefish with a reduced internal cuttlebone
A flamboyant cuttlefish crossing a black-sand flat looks like a wind-up toy in ceremonial dress — a fist-sized animal ambling on two arm tips and skin flaps because its reduced internal cuttlebone barely floats it, pulsing waves of maroon, yellow, and white down its body as it goes. The pageant reads as warning coloration: laboratory work has reported significant toxins in its muscle, a rarity among cuttlefish, and the animal behaves like something with nothing to prove, hunting tiny shrimp and fish in open daylight with a deliberate tongue-flick strike of its feeding tentacles. At rest it fades to mud brown and simply disappears against the silt. Females glue eggs under coconut shells and rubble, and hatchlings emerge as perfect miniatures already flashing the family colors. It is a muck signature — ask the guides which slope has been producing.
Where and when to see one
"Resident" means most dives at that destination encounter them; "seasonal" means reliably present in the listed months; anything else is a bonus, not a plan.
| Destination | Reliability | Months | Notes |
|---|---|---|---|
| Lembeh StraitIndonesia | Occasional | Year-round | |
| AnilaoPhilippines | Occasional | Year-round | |
| Banda Sea & AmbonIndonesia | Occasional | Year-round | |
| Dumaguete, Dauin & Apo IslandPhilippines | Occasional | Year-round | |
| Milne BayPapua New Guinea | Occasional | Year-round |
Best month, at a glance
Understanding them
Habitat: Open sand, silt, and mud flats of sheltered bays and muck slopes, usually walking rather than swimming.
Range: Indo-Malayan region and northern Australia — Indonesia, Malaysia, the Philippines, and New Guinea.
Behavior: Ambles across the bottom on two arm tips and skin flaps, pulsing waves of maroon, yellow, and white when hunting or alarmed; fades to mud brown at rest and vanishes.
Diet: Small shrimp and fishes taken with a slow-motion stalk and a lightning strike of the feeding tentacles.
Size: typically around 0.06 m; documented up to 0.08 m (mantle length).
How to behave around one
Stay low and behind its line of travel, keep strobes reasonable, and never lift shells or coconut halves — females glue eggs beneath exactly that kind of cover.
Conservation
Formally Data Deficient; a bottom-bound lifestyle on developable coastal seabeds is its main exposure.
Charted sites known for them
Watch
From the official channels
Best Places to Dive with Whale Sharks
Outrageously Tiny Fish
Sink or Swim? with Monét X Change | Monterey Bay Aquarium
Videos are embedded links to their creators' own channels — we host nothing and credit everything.