Alex Mustard / Large school of Humpback snapper (Lutjanus gibbus) form into a tight ball on a coral reef. North Ari Atoll, Maldives. Indian Ocean.

Tony Wu / Humpback red snapper (Lutjanus gibbus) juvenile, Kokopo, Papua New Guinea.

Pascal Kobeh / School of Bluelined / Bluestriped snappers (Lutjanus kasmira) and a school of humpback snappers (Lutjanus gibus) Maldives. Indian Ocean.

Pascal Kobeh / School of Humpback snappers (Lutjanus gibbus) on a coral reef, Madagascar. Indian Ocean.

Pascal Kobeh / School of Humpback snappers (Lutjanus gibbus) on a coral reef, Madagascar. Indian Ocean.

Franco Banfi / Shoal of Humpback red snapper (Lutjanus gibbus) Maldives, Indian Ocean

Michele Westmorland / Humpback snapper (Lutjanus gibbus) portrait, Palau, Micronesia.

Georgette Douwma / Humpback or Paddletail snappers (Lutjanus gibbus), large school, Maldives, Indian Ocean

GEORGETTE DOUWMA / Humpback / Paddletail snapper (Lutjanus gibbus). Bali, Indonesia

Franco Banfi / Scuba diver with Paddletail Snapper (Lutjanus gibbus), Bluelined Snapper (Lutjanus kasmira), Moorea Island, French Polynesia, Pacific Ocean. Model released.

Alex Mustard / Seagrass meadow (Thalassodendron cilliatum) with young Paddletail snappers (Lutjanus gibbus). Seagrass is threatened in the Maldives, where many resorts actively pluck the plants from the water to cre...

Willem Kolvoort / Blackspot snappers (Lutjanus fulviflamma) between the roots of mangroves, Johnny Channel, Aldabra, Indian Ocean

Willem Kolvoort / Blackspot snappers (Lutjanus fulviflamma) between the roots of mangroves of shallow Johnny Channel, Aldabra, Indian Ocean

Willem Kolvoort / Split level view of Blackspot snappers (Lutjanus fulviflamma) hiding under coral 'mushroom' during low tide in the Aldabra lagoon, Passe Femme / Femme channel, Aldabra, Indian Ocean

Willem Kolvoort / Blackspot snappers (Lutjanus fulviflamma) always hide under this coral 'mushroom' during low tide in the Aldabra lagoon, Passe Femme / Femme channel, Aldabra, Indian Ocean

Willem Kolvoort / Blackspot snappers (Lutjanus fulviflamma) always hide under this coral 'mushroom' during low tide in the Aldabra lagoon, Passe Femme / Femme channel, Aldabra, Indian Ocean

Willem Kolvoort / Split level view of Blackspot snappers (Lutjanus fulviflamma) in shallow mangrove lagoon, Passe Grande Magnan / Magnan channel, Aldabra, Indian Ocean

Willem Kolvoort / Blackspot snappers (Lutjanus fulviflamma) in the mangroves, Passe Grande Magnan / Magnan channel, Aldabra, Indian Ocean

Willem Kolvoort / Blackspot snappers (Lutjanus fulviflamma) in the mangroves, Passe Grande Magnan / Magnan channel, Aldabra, Indian Ocean

Georgette Douwma / Humpback red snapper or Paddletail snapper (Lutjanus gibbus). Tulamben, Bali, Indonesia.