BLOOFINZ-2022
19 Discrete Casts
Eastern Indian Ocean
69,851 Particles
Cruise & Stations
BLOOFINZ-2022 · Eastern Indian Ocean · R/V Roger Revelle · Feb–Mar 2022 · 19 discrete cast stations · FlowCAM flow cytometry. Click any station card to explore species composition, biodiversity metrics, and environmental data.
01
BLOOFINZ-2022 Cruise Overview
Eastern Indian Ocean · Argo Basin · Feb–Mar 2022 · R/V Roger Revelle · 19 Discrete Cast stations · FlowCAM flow cytometry
Total Casts
19 stations
BFZ-Cast7 → BFZ-Cast143
Raw Particles
69,851 imaged
FlowCAM flow-through
Sampled (v9)
3,800 images
200 per cast · fast inference
High Confidence
524 labeled
≥ 80% confidence threshold
CSV Columns
70 features
ESD, biovolume, RGB, chains
Depth Range
5–10 m
Surface + subsurface
Segment Format
.jpg crops
Binary-masked particle images
Collection Date
2022 Feb
Eastern Indian Ocean expedition
Discrete Cast Folders
Expedition Summary
Cruise IDBLOOFINZ-2022
PlatformResearch Vessel
RegionArabian Sea
InstrumentFlowCAM (flow cytometry)
Image typeBrightfield + fluorescence
Calibration factor1.3699 µm/pixel
LabGoes Lab · LDEO · Columbia
● ALL CAST STATIONS — CLICK TO EXPLORE
03
Discrete Cast Inference Results
V9 model applied to BLOOFINZ-2022 FlowCAM segments · 200 images/cast · 19 casts sampled
Inference Summary
Total sampled3,800 images
High-conf (≥80%)524 (13.8%)
Confidence threshold0.80
Model usedv9_infer.keras
Runtime (A100)~3 minutes
Batch size64 (fast mode)
Full dataset69,851 particles
High-Confidence Class Distribution (≥80%)
Confidence Analysis
Low Confidence Explanation — Why Only 13.8% Pass ≥80% Threshold
Domain Gap
Library vs Real-World
V9 trained on curated library images. Discrete cast particles are raw FlowCAM scans with varying focus, orientation, and debris — introducing a visual domain gap.
Debris & Noise
Non-biological particles
Mineral particles, detritus, and aggregates appear frequently in real ocean samples. These ambiguous particles naturally receive low classification confidence.
Next Step
Discrete retraining
Pseudo-labeling the 524 high-confidence particles and retraining on Discrete data should dramatically improve real-world accuracy — the professor's directed approach.
11
Depth Profile Analysis
Sample depth extracted from cast folder names · BFZ-CAST-XXX-YM → Y meters depth
Known Cast Depths (from folder names)
Depth Distribution
Predicted Species at Depth — Discrete Cast Inference (high-conf ≥80%)
5m vs 10m · stacked bar · species predicted by V9 across all casts · exact cast-level data pending Anima
12
Geospatial Distribution
Eastern Indian Ocean · Argo Basin · R/V Roger Revelle · Feb–Mar 2022 · real GPS positions from BLOOFINZ_MET.xlsx
Eastern Indian Ocean — Argo Basin · 19 Cast Stations · Feb–Mar 2022
5m depth casts
10m depth casts
Mixed/both depths
Cycle stations
Cruise Metadata
VesselR/V Roger Revelle
DatesFeb–Mar 2022
RegionEastern Indian Ocean
Sub-regionArgo Basin
Lat range~17°S – 24°S
Lon range~110°E – 121°E
StrategyAdaptive sampling
Ecological Context
Oligotrophic Waters
Argo Basin is nutrient-poor (low NO₃, PO₄). Dominated by pico/nanoplankton (Prochlorococcus, Synechococcus). N₂ fixation hotspot.
Bluefin Tuna Habitat
Southern Bluefin Tuna spawn here. BLOOFINZ = Bluefin Larvae in Oligotrophic Ocean Foodwebs, Investigations of Nutrients to Zooplankton.
Real GPS — BLOOFINZ_MET.xlsx
Positions derived from R/V Roger Revelle underway GPS data. Swapped Lat/Lon columns corrected. Click any station for SST, salinity, and fluorescence.
Sea Surface Conditions — Real R/V Revelle Underway Data
SST (°C) + Fluorescence · from BLOOFINZ_MET.xlsx · swapped Lat/Lon corrected · 19 cast stations
Daily Chlorophyll-a & Fv/Fm — 133,806 CLS Measurements · Full Cruise Track
Calibrated Chl-a (µg/L) + Photosynthetic Efficiency (Fv/Fm) · BLOOFINZ_CLS_FINAL.xlsx · Jan 29 – Mar 3 2022
● BIODIVERSITY METRICS — ALL CAST STATIONS
| Station | Depth | Shannon H′ | Simpson D | Pielou J′ | Richness | Dominant | % |
|---|
Phytoplankton Classification · Goes Lab (LDEO) · Columbia University · Model v9 · EfficientNetV2-L · TF 2.19
Session Active