{
  "params": {
    "species": {
      "type": "choice",
      "options": [
        "reef",
        "blue",
        "great",
        "hammer"
      ],
      "default": "reef",
      "label": "Species",
      "describe": "Body plan and colour: reef (grey, black fin tips), blue (slender, deep blue, long side fins), great (heavy grey body, sharp white belly), hammer (hammerhead: wide flat head with eyes at the tips)."
    },
    "mouth": {
      "type": "toggle",
      "default": false,
      "label": "Open mouth",
      "describe": "Jaw dropped open showing rows of teeth. Off = mouth closed."
    },
    "tag": {
      "type": "toggle",
      "default": false,
      "label": "Research tag",
      "describe": "A small yellow tracking tag clipped to the dorsal fin; it glows at night."
    },
    "size": {
      "type": "range",
      "min": 0.4,
      "max": 2.2,
      "step": 0.05,
      "default": 1,
      "label": "Size",
      "describe": "Uniform scale. 1 is 3 m long; 0.4 is a 1.2 m pup; 2.2 is a 6.5 m giant."
    }
  },
  "presets": {
    "great white": {
      "species": "great",
      "mouth": true,
      "size": 1.6
    },
    "hammerhead": {
      "species": "hammer"
    },
    "tagged blue": {
      "species": "blue",
      "tag": true
    }
  },
  "night": {
    "tag": {
      "zone": "tag",
      "color": "#fff27a",
      "intensity": 1.6,
      "describe": "The research tag blinks yellow."
    }
  }
}