Tom Nalepa of NOAA's Great Lakes Environmental Research Laboratory studies invasive mussels in the Great Lakes.

Launching Pisces V submersible

The R/V Ka'imikai-o-Kanaloa launches the Pisces V over her stern, while the chase boat stands by.

Divers Dave Pence (left) and Ken Longenecker hold up a banner commemorating the Hawai's Undersea Research Laboratory's 1,000th dive with the Pisces submersibles.

Ken Longenecker swims down to the acrylic dome brought down by the Pisces V, and checks to make sure that the special pump is working correctly. The dome is used to apply a non-toxi stain to the Leptoseris coral head to be used for measuring the growth rate of the coral over time.

Inside the 81-ton, 43 X 20 x 16.5 foot underwater laboratory are six bunks, shower and toilet, hot water, microwave, trash compactor, refrigerator, and even air conditioning and computers linked back to shore. Aquarius undersea habitat .

The seamount display at the Sant Ocean Hall of the Smithsonian National Museum of Natural History.

The main hall of the Sant Ocean Hall of the Smithsonian National Museum of Natural History.

The Science on a Sphere display at the Sant Ocean Hall of the Smithsonian National Museum of Natural History.

This orange bamboo coral is between four and five feet tall and was found 5,475 feet below the surface. It is believed to belong to a newly discovered genus.

The Norwegian North-Atlantic Expedition 1876-1878. Track and station map of the Norwegian North Atlantic Expedition showing systematic mode of data collection.

The Norwegian North-Atlantic Expedition 1876-1878. Map showing proportion of salt in the surface water. Plate No. I.

The Norwegian North-Atlantic Expedition 1876-1878. Map showing proportion of salt in the deeper strata. Plate No. II.

The Norwegian North-Atlantic Expedition 1876-1878. Map showing proportion of nitrogen in the deeper strata of the North Atlantic Ocean. Plate No. III.

The Norwegian North-Atlantic Expedition 1876-1878. Chemistry. Amount of carbonate of lime in biloculina clay. Plate No.

The Norwegian North-Atlantic Expedition 1876-1878. Starboard view and deck plan of the VOERINGEN, ship of the Norwegian North-Atlantic Expedition.

The Norwegian North-Atlantic Expedition 1876-1878. Deep sea sounding method on the VOERINGEN.

The Norwegian North-Atlantic Expedition 1876-1878. Donkey engine for dredging and hauling material to the surface on the VOERINGEN.

The Norwegian North-Atlantic Expedition 1876-1878. A variety of fish collected on the Norwegian North-Atlantic Expedition.

The Norwegian North-Atlantic Expedition 1876-1878. A variety of fish collected on the Norwegian North-Atlantic Expedition.

The Norwegian North-Atlantic Expedition 1876-1878. A variety of fish collected on the Norwegian North-Atlantic Expedition.

The Norwegian North-Atlantic Expedition 1876-1878. Holothuroidea. Plate XIII. Fig. 1 - Myriotrochus Rinkii, Steenstr. Fig. 2 - Ocnus (Cucumaria) minutus, Fabricius. Fig. 3 - Trochostoma arcticum, Marenz. Fig. 4 - Trochostoma Thomsonii, Dan. & Koren. Fig. 5 - Trochostoma Thomsonii, var. maculatum, Dan & Koren. Fig. 5 - Part of posterior end of Tr. Thomsonii, var., magnified.

The Norwegian North-Atlantic Expedition 1876-1878. Mollusca. Table I. Fig. 1-5, Spinther arcticus. Fig. 6-10, Polynoe spinulosa. Fig. 11-14, Polynoe foraminifera. Fig. 15-21, Polynoe islandica. Fig. 21-26, Polynoe assimilis.

The Challenger Reports. Vol. IX, Plate LXXVII. The Foraminifera. Globigerina. Orbulina bulloides, d'Orbigny.

The Challenger Reports. Vol. IX, Plate LXXVIII. The Foraminifera. Globigerina. Orbulina universa, d'Orbigny.

The Challenger Reports. Vol. IX, Plate LXXIX. The Foraminifera. Globigerina. 1-7, Globigerina bulloides, d'Orbigny. 8-10, Globigerina inflata, d'Orbigny. 11-16, Globigerina rubra, d'Orbigny. 17, Globigerina dubia, Egger.

The Challenger Reports. Vol. IX, Plate XCVI. The Foraminifera. Planorbulina ( Truncatulina). See Image expl3018.

The Challenger Reports. Vol. IX, Plate XCVI. The Foraminifera. Planorbulina ( Truncatulina). Accompanying text.

The Challenger Reports. Vol. IX, Plate C. The Foraminifera. Carpenteria_ Polytrema. 1-4, Carpenteria utricularis, Carter. 5-9, Carpenteria miniaceum, Linne, sp.

The Challenger Reports. Vol. IX, Plate CI. The Foraminifera. Polytrema_ Tinoporus (Tinoporus_Gypsina). Accompanying text.

The Challenger Reports. Vol. IX, Plate CI. The Foraminifera. Polytrema_ Tinoporus (Tinoporus_Gypsina). See expl3020 for accompanying text.

The Challenger Reports. Vol. IX, Plate CXV. The Foraminifera. Pulvinulina_ Rotalia, etc. Accompanying text.

The Challenger Reports. Vol. IX, Plate CXV. The Foraminifera. Pulvinulina_ Rotalia, etc.

The Challenger Reports, Volume XXI, Plate I. The Hexactinellida, Euplectella aspergillum Owen. A glass sponge, popularly known as "Venus's flower basket." Collected in the Philippine Islands at a depth of 100 fathoms.

The Challenger Reports, Volume XXI, Plate VII. The Hexactinellida, Taegeria pulchra F.E. Schulze. A glass sponge.

The Challenger Reports, Volume XXI, Plate XLIV. The Hexactinellida, Pheronema giganteum, F.E. Schulze. A glass sponge.

The Challenger Reports, Volume XXI, Plate XLIV. The Hexactinellida, Periphragella elisae, Marshall. A glass sponge.

The Challenger Reports, Report on Deep Sea Deposits. Fragments of pumice and manganese-iron nodules. Plate I.

The Challenger Reports, Report on Deep Sea Deposits. Manganese-iron nodules. Plate II.

The Challenger Reports, Report on Deep Sea Deposits. Manganese-iron nodules. Plate II, accompanying text.

The Challenger Reports, Report on Deep Sea Deposits. Shark's teeth. (Carcharodon, Carcharias, &c.) Plate V.

The Challenger Reports, Report on Deep Sea Deposits. Shark's teeth. (Carcharodon, Carcharias, &c.) Plate V, accompanying text.

The Challenger Reports, Report on Deep Sea Deposits. Calcareous Deposits. Plate XXIV.

The Challenger Reports, Report on Deep Sea Deposits. Shark's teeth. (Oxyrhina, Lamna, &c.) Plate VI, accompanying text.

The Challenger Reports, Report on Deep Sea Deposits. Shark's teeth. (Oxyrhina, Lamna, &c.) Plate VI.

The Challenger Reports, Report on Deep Sea Deposits. Deep-Sea Deposits. Chart I. A map of the world-wide distribution of deep sea deposits by John Murray.

The Challenger Reports, Report on Deep Sea Deposits. Calcareous Deposits. Plate XII.

The Challenger Reports, Report on Deep Sea Deposits. Calcareous Deposits. Plate XXIV. Representative casts which are formed in and on Foraminiferous shells and other calcareous organisms in different varieties of marine deposits.

The Challenger Reports, Report on Deep Sea Deposits. Various phases assumed by glauconite.

The Challenger Reports, Report on Deep Sea Deposits. Various phases assumed by glauconite. Accompanying text.