CACHALOTE I - Mar del Plata

We're not going to lie, Cachalote I is a shallow one, barely a meter deep at high tide. But for a specific kind of diver, and we count ourselves among them, this site is pure magic. It's the skeleton of an old fishing trawler, stripped bare by decades of waves and salt, lying right there near the shore. We love the way the light catches the twisted metal, creating these surreal patterns on the sand below. You can practically stand up in places, but don’t let the depth fool you. This wreck is a haven for small, interesting things. Look closely, and you'll spot little crabs scuttling in the shadows of corroded plates, or tiny gobies darting between barnacle clusters. It’s less about grand exploration and more about intimate observation. Our favourite is hunting for the nudibranchs that often cling to the seaweed growing on the hull, surprisingly colourful against the muted tones of the wreck. It's a fantastic spot for macro photography, especially on a calm, sunny day when the water is still and clear. Leave the heavy gear behind; a mask, snorkel, and maybe some fins are all you need for an hour or two of absorbing discovery.

Location
Mar del Plata, Argentina, South America
Coordinates
-34.466835, -57.850500
Type
wreck
Maximum Depth
1m

Wreck History - CACHALOTE I

Vessel Type
fishing vessel
Cause
unknown

The Cachalote I rests in the shallow coastal waters near Mar del Plata, Argentina's premier fishing port. While the specific history of this vessel and the story of its loss are unknown, its name offers a strong clue to its past. 'Cachalote' is the Spanish word for sperm whale, heavily suggesting it was a fishing or whaling boat that operated out of the bustling harbour. Lying at a depth of just one meter, it is now a broken but intriguing feature on the seabed.

Designated a 'Dangerous Wreck', divers and snorkelers should approach the Cachalote I with care, as its dilapidated structure presents potential hazards. For local divers, it offers an easy-to-access site to explore a piece of the region's maritime heritage and observe how nature reclaims man-made objects. The remains of the vessel act as a micro-habitat, providing shelter for small fish, crustaceans, and other marine life typical of the South Atlantic coast.

Best Time to Dive in Mar del Plata

The warmest water temperatures in Mar del Plata occur in January, averaging 26.7°C. The coolest conditions are in July at 11.0°C.

Monthly Water Temperatures

  • January: 26.7°C
  • February: 25.8°C
  • March: 24.1°C
  • April: 20.3°C
  • May: 16.3°C
  • June: 13.0°C
  • July: 11.0°C
  • August: 12.2°C
  • September: 14.8°C
  • October: 18.2°C
  • November: 22.3°C
  • December: 24.8°C

Nearby Dive Sites in Mar del Plata

Nearest Dive Centres to CACHALOTE I

Marine Life in Mar del Plata

Home to 33 recorded species including 19 reef fish, 7 sharks & rays, 3 whales & dolphins, 2 other, 1 crabs & lobsters, 1 sea snails & nudibranchs.

Notable Species

Recommended Packing List for CACHALOTE I

Based on average water temperature of 19.1°C, currents 3 cm/s.

  • Wetsuit (3-5mm) - comfortable for 19°C water
  • Mask - essential for every dive
  • Fins
  • BCD - buoyancy compensator
  • Regulator - your most safety-critical piece of gear
  • Dive Computer - tracks depth, time, and NDL
  • Surface Marker Buoy (SMB) - essential for boat pickups
  • Dive Torch - useful for crevices and colour at depth
  • Underwater Camera - capture your diving memories